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    #16
    Sounds like time to make your own harness with at least 8 AWG for the charge cable.
    2012 Mazda5 Touring | Finally working on the LTD again!

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      #17
      Originally posted by 1987cp View Post
      Sounds like time to make your own harness with at least 8 AWG for the charge cable.
      Why go through all the trouble of making a harness for an obsolete alternator. If you're gonna run a new harness, go to a 3G alternator. And buy the pigtail from your auto parts store, and run a brandy new charge cable to the starter solenoid.
      Last edited by 86VickyLX; 03-23-2009, 03:33 PM.

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        #18
        Actually, a 2G harness is readily converted to 3G, and vice versa. I'm still running a 2G in the formerly-3G-equipped P72 with the 2G stuff just piggybacked right on (so it can be put back to 3G configuration without cutting).
        2012 Mazda5 Touring | Finally working on the LTD again!

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          #19
          The ground at the voltage regulator comes through the mounting screws. There is no ground wire in that flat plug. If you have rust under the mounting screws, it won't work properly. Try pulling the regulator and cleaning that area up with a wire brush.

          The wiring does look sort of bitched up. You can re-wire it fairly easily. F on the regulator goes to FLD on the alternator. S on the regulator goes to S or Sta (i forget how its marked) on the alternator. Thats really about it, the circuit is pretty simple.
          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 grandpa spec white and cranberry

          1984 Lincoln Continental TurboDiesel - rolls coal

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

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            #20
            Update

            Well, after taking Gadget's advice. I cleaned up the ground connection to the regulator and I am now seeing 14.5volts of output from the alternator at idle.

            I do now, however, need to work on the fact that the Amp light does not lightup at startup. I will light up if I ground the green/red wire that is in the coupler. However, currently that wire is set up to do nothing. The wiring diagram in the manual shows that there are two wires connected to the amp light negative side. A R/LG and a LG/R wire. One of them is not used. I can only guess that the one that should be used is not being ground. (Or my wiring is no good and that is the one that should be grounded)

            I should note that with regard to the coupler, there are plates at the back that force the wires into the locations that they are in. It is reasonable that the light green/red wire is the one that is not used and that the black wire is intended to run up into the car.

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              #21
              What terminal is the green/red going to? It should be on the I terminal.
              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 grandpa spec white and cranberry

              1984 Lincoln Continental TurboDiesel - rolls coal

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

              Comment


                #22
                Out from the I terminal is the black and orange wire. It goes to the aforementioned coupler that connects it to a black wire.(That leads into the along with the R/LG wire) Is it possible that this black and R/LG wire are switched and the R/LG wire should be connected? I think that this may fix the problem.

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                  #23
                  Disclaimer: I don't have an 89 manual to reference, this comes from my 86 book which ought to be the same.

                  according to what I have here, the orange/light blue should go from F on the regulator to Fld on the alternator
                  white/black goes from S on the reg to Sta or Stator on the alternator
                  light green/red goes to I on the alternator, and from there goes to the idiot light (no black wire at all)
                  yellow/white goes from A on the regulator through a fuse link to the battery. Its also got the little condensor dealie on that wire.

                  I'm thinking there is either something unusual with your wiring, or maybe its to do with the Instaclear windshield wiring. I know that interfaces with the alternator somehow, but I don't actually know the details on that.
                  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 grandpa spec white and cranberry

                  1984 Lincoln Continental TurboDiesel - rolls coal

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

                  Comment


                    #24
                    If it was a dealer added option, maybe the technician was hung over that morning... lol
                    Pete ::::>>> resident LED addict and CFI defector LED bulb replacements
                    'LTD HPP' 85 Vic (my rusty baby) '06 Honda Reflex 250cc 'Baileys' 91 Vic (faded cream puff) ClifFord 'ODB' 88 P72 (SOLD) '77 LTDII (RIP)
                    sigpic
                    85HPP's most noteworthy mods: CFI to SEFI conversion w/HO upperstuff headers & flowmasters P71 airbox Towncar seats LED dash light-show center console w/5 gauge package LED 3rd brake light 3G alternator mini starter washer/coolant bottle upgrade Towncar power trunk pull underhood fuse/relay box 16" HPP wheels - police swaybars w/poly rubbers - budget Alpine driven 10 speaker stereo

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                      #25
                      Update

                      It seems that when I ground out the light green/red wire. The amp light kicks on at startup but will stay on. I need to get my multimeter back and verify if that is for good reason or not. In any case. I've attached a summary of the what kind of wiring I have going on.
                      Attached Files

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                        #26
                        BTW

                        Can anyone tell me what color of wire they have coming from their external voltage regulator from the I (Closest to Engine) terminal. The Hayne's wiring diagram suggests that the voltage regulator determines when to ground this wire out and that the voltage relative to ground is always supplied to the Amp light. Does this sound correct?
                        Last edited by july7543; 04-10-2009, 01:08 PM. Reason: Grammar Corrections

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                          #27
                          Strike Out

                          Strike that previous thought on the purpose of the Green/Red Wire. From what I can gather. The Amp light works this way. To one side of the light, battery voltage is supplied. To the other side of the light, alternator voltage is supplied. Thus, no current flows. When ignition is turned on, there is no alternator voltage present so current flows through the light due to the voltage difference relative to ground. When the alternator fires up, there is no relative voltage so no current flows keeping the light unlit. In my case, the LG/R wire is not connected to the voltage regulator so the light will no illuminate under any circumstances.

                          My thought is that it needs to be wired into the voltage regulator. I am not sure what the black wire is for but it doesn't appear to be a ground. I will go ahead and check to see if there is voltage at the I terminal if there there is, I will wire the LG/R wire into there. If there is no voltage, I can only assume that both of my voltage regulators (I've swapped in the OEM one for testing) are bad.

                          Can anyone check if their I terminal has voltage at that location?

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                            #28
                            I think you're right... Ive been monkeying with the wiring on my 85 (which was externally regulated) during the 3G swap, everything fron the alternator to the regulator is sitting in my basement.
                            While probing around I did read power on that green/red wire, and it does go to the 'I' terminal on the regulator. I also noticed that this voltage had a load on it already, because it didnt short my meter when i grounded it Evidently you also need this to charge, so it looks like you solved your problem!
                            Pete ::::>>> resident LED addict and CFI defector LED bulb replacements
                            'LTD HPP' 85 Vic (my rusty baby) '06 Honda Reflex 250cc 'Baileys' 91 Vic (faded cream puff) ClifFord 'ODB' 88 P72 (SOLD) '77 LTDII (RIP)
                            sigpic
                            85HPP's most noteworthy mods: CFI to SEFI conversion w/HO upperstuff headers & flowmasters P71 airbox Towncar seats LED dash light-show center console w/5 gauge package LED 3rd brake light 3G alternator mini starter washer/coolant bottle upgrade Towncar power trunk pull underhood fuse/relay box 16" HPP wheels - police swaybars w/poly rubbers - budget Alpine driven 10 speaker stereo

                            Comment


                              #29
                              No Luck Yet

                              Well, it looks like I haven't solve things entirely yet. It appears that I always have voltage at the regulator I terminal (Ignition on or runnning) and as a result the light won't light. Even when I took the alternator voltage away it didn't light. I'm going to study the wiring further. Any thoughts?

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                                #30
                                Those idiot lights are weird. I have seen myself the weirdness of the light. Get this, a new battery for an '88 Grand Marquis, right, light comes on in run position, with engine off, with engine on, the light stays off, but the alternator did not charge. This alternator zapped the battery of basically all of it's power to the point no lights came on in the car. The light was never on as the car was running, even though there was no charge from the alternator.

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