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Thread: No Radio Illumination

  1. #1

    Default No Radio Illumination

    One thing Iíve noticed with all my radio swapping Iíve done is that none of them had working illumination. In the sunlight you can see the numbers but thatís the only time. Last time I pulled the radio I tested for 12v at the illumination wire and get nothing. Has anyone else had this issue before? Everything else works.

    Also what does this connector go to?

    Itís next to the hvac panel.


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  2. #2
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    Usually the radio illumination works with the headlights on, right? Guess it might depend on the radio.
    ..

  3. #3
    I'm an air-conditioned gypsy gadget73's Avatar
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    right, illumination is for the lights around the knobs when headlights are on. The backlight bulb is something else. Prob the bulb is burned out. It lives behind the faceplate. Per the service manual

    "remove the top cover. Rotate the lamp assembly CCW and pull from the light shield. This will expose the LCD backlight lamp. Then, simply pull the lamp from the assembly and install a new lamp". No idea what bulb it takes, you're on your own for that.

    The other connector I think is for the warning chime module for headlights on or key in the ignition. If yours never dings, thats why.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  4. #4

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    Hmm I find it hard to believe all radios Iíve installed have bad bulbs. I thought that was the issue at first but I changed the bulb in 2 of them and it didnít make a difference. It took a bulb with a 194 base but a weird globe. Perhaps I checked the switched 12v source. Iím bummed if it really is the radio. I thought about getting one of mine refurbished because aftermarket ones look out of place in our cars. I guess thatíll move to the front of the to do list as it bothers me.

    The harness isnít for the chime as mine works like it should. Maybe itís for the digital clock or tripminder? Just curious, not really important.




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  5. #5
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    I have the same radio in my 88. Had to put a bulb for the display. They are famous for that. You sure you got the display bulb and not the backlight bulb? I got mine from a 90’s Ranger Instrument Cluster (I chose the 4WD indicator light when the donor was a 2WD truck).

    If your car came with a tripminder, then that could be the harness. Colors look right from memory. The digital clock was smaller, just four wires. The pictured harness will plug into the four wire clock connector if you trace the wires back a little in the dash.

  6. #6

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    I replaced the only bulb I saw, I donít think I missed one.

    And no my car didnít come with trip minder, itís a gs trim. It has an analog clock too.


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  7. #7
    I'm an air-conditioned gypsy gadget73's Avatar
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    https://youtu.be/h5Sp2MoTfl0

    apparently there is a pin that has to get power in order for it to work. If this isn't the original type radio in the car its possible yours doesn't have the connection. Looking in the book, it appears to be 3 up from the bottom on the one that has power and ground. not sure if that is meant to be powered off the key-on power or what. I'd expect it to be internally powered so its live only when the radio is on.
    Last edited by gadget73; 09-10-2020 at 05:44 PM.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  8. #8

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    There are two 12v pins, one is constant, one is switched. That was something I tested and didnít get power at the switched 12v pin. I have to get up early tomorrow so I canít do any more testing today but I will Sunday. Iíll test again but Iím pretty sure Iím not getting power. I really didnít want to pull the dash apart.


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  9. #9
    I'm an air-conditioned gypsy gadget73's Avatar
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    just pull the radio out, don't need to go further.

    and confirm what should be on that pin. If your car did not come with this style radio, the wiring to that pin is probably not going to be correct. No matter what radio there will be a constant hot, a key-on hot, and a dash light hot. I've never had a car that used the 6 button radio so I don't have an EVTM that shows what ought to be there. My fleet of junk all came with either the square plug 4 button radio or the 90s style that has no knobs.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  10. #10

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    I guess it could be that Iím using the wrong radio. I got the car with no radio so I donít know what it originally had. Itís a gs trim. Did Ford still use analog radios in 87? Maybe the 4 button radio has a different pinout, or perhaps it is the radios themselves. Iíll look into it tomorrow.


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  11. #11
    I'm an air-conditioned gypsy gadget73's Avatar
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    analog radios existed in 87 but it seems to not have been an option on the cars.

    My 87 radio service manual lists the 4 button radio with and without tape, the electronic AM radio, and the 6 button radio without cassette as options on the 87 Ford and Mercury (Vic/GM). For whatever reason the full size cars don't actually show as a model in the master parts manual or the radio service manual, its just "Ford". There is no Town Car listing either, you get "Lincoln".

    I have never seen one of those electronic AM radios. They look like the 6 button radio, but just presets and a volume control.


    What you need is an EVTM that shows what the connections ought to be. Maybe one from an 88 that has the 6 button radio. Fair bet if you feed power to the LCD pin it will fix it if the bulb is not the issue. I don't know where Ford fed that from.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  12. #12

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    I actually do have a manual and it seems to be pretty useless for the radio. I had to wire in new connectors because the po cut the harnesses for whatever reason. Following that ďdiagramĒ there should be a second 12v feed but I donít have 12v at that pin for whatever reason. I thought about jumping it, maybe Iíll do it temporarily to see if that makes a difference. Kind of stupid that the lcd bulb is on its own circuit of thatís the case.


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  13. #13
    I'm an air-conditioned gypsy gadget73's Avatar
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    it is stupid. why that wouldn't be internally connected I don't know.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  14. #14

    Default

    I am going to take a guess: I think the non-switched lead to the LCD illumination was so that if the radio had a clock, the LCD could always be illuminated. However, if the car had a separate clock, it could be tied to radio power, so the clock wouldn't be visible (and the frequency would be displayed when the radio was on); this would require the missing lead to be either connected to the AMPLIFIER power source (from the radio), or the IGNITION power source (to the radio); either case would have it as a jumper on the back of the connector, which has been lopped off by the PO.

    That way, the radio wouldn't need to be different between cars with separate clocks, and cars without clocks.

    This is purely speculation, my EVTM is far away and I'm thinking out loud, maybe it will help.
    Last edited by bgreywolf; 09-16-2020 at 03:47 AM.

  15. #15

    Default

    Hmm that would make sense. The radio thatís in it right now was out of a thunderbird to itís possible. The other radios Iíve tried may not have been from panther cars so itís possible all of them are wired differently. Iíll call up a junkyard and get a new one if possible to try again.

    Also after looking over my manual it looks like that harness I posted on the op looks to be for the lock lamps or whatever itís called so when the handle is pulled the lights will come on for 25 senconds. If you look at the pic you can see two holes in that bracket. Thatís where the module is supposed to go.


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  16. #16
    I'm an air-conditioned gypsy gadget73's Avatar
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    possible about the clock thing. The radio schematics do show a switch but there is a dotted-line jumper across the switch and its marked "with clock".

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  17. #17
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    Quote Originally Posted by gadget73 View Post
    possible about the clock thing. The radio schematics do show a switch but there is a dotted-line jumper across the switch and its marked "with clock".
    Usually in the schematics, a dotted line means some type or option, or difference between models. So that makes perfect sense
    ..

  18. #18

    Default

    This is the schematic from my manual



    There are a few other schematics for the radio but this looks to be the most basic one, aside from the conventional radio. The 12v on the upper left side Y/BK Iím not getting 12v. Iíll have to probe the fuse box to see if I at least get power to that pin with the key on.


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  19. #19

    Default

    As fate would have it my multimeter was dead but what I did was remove fuse 8. The radio wouldnít turn on but was getting power from fuse 11 so you could hear the internal amp pop when Iíd press the volume on button. When I put fuse 8 back in it would turn on like usual but still no lcd backlight. This leads me to believe that either itís the wrong radio as suggested by Kellen (all have been 6 button) or all of them are dead, unlikely.


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  20. #20
    I'm an air-conditioned gypsy gadget73's Avatar
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    Just tie the key-on hot wire to the LCD pin on the connector and that should take care of it.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

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