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Thread: Question about A/C Panel Lights - Not coming on as normal

  1. #31
    My friends think I'm nuts jawn101's Avatar
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    Question about A/C Panel Lights - Not coming on as normal

    I pulled out the relay and tried others, and did a continuity check on the original one- normally closed terminals are normally closed.

    With the relay removed, resistor installed, key on, there is no voltage at pin 87a. But the other fuse 10 components work; the AC mode switch and door lock telltale are good
    Jon
    1981 DMC-12 #02100. July 1981. 5-speed, black, grooved w/flap.
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  2. #32
    My friends think I'm nuts jawn101's Avatar
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    Quote Originally Posted by DMC5180 View Post
    Are you absolutely sure you have Power at RED resistor socket 87a with the key ON?
    No, not sure anymore. My test when I stated that must have been suspect. I now see no voltage there.
    Jon
    1981 DMC-12 #02100. July 1981. 5-speed, black, grooved w/flap.
    restoration log, March 2011 to present
    full and detailed photo restoration log

  3. #33
    Senior Member DMC5180's Avatar
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    Question about A/C Panel Lights - Not coming on as normal

    Quote Originally Posted by jawn101 View Post
    No, not sure anymore. My test when I stated that must have been suspect. I now see no voltage there.
    Okay, now things make more sense.

    Deleted previous statements
    Last edited by DMC5180; 04-28-2017 at 08:26 PM.
    DENNIS

    VIN 5180, Frame 3652, STAGE II​, DM-eng Solid State Solutions (RPM Rly, Dm.Lt.Mod., Fan Fail Mod. , FAN Rly, HS.Rly) , HID headlights, SPAX user since 2009, Eibach springs, M Adj. Rear LCA's, DPNW poly-sway bar kit, DMCEU LCA Stabilizer link kit, DMCMW Illuminated door sills, Aussie Illuminated SS Shifter plate, REAL MOMO EVO Steering wheel, DELOREANA Extended View Side Mirrors w/ Heaters, DELOREANA LED Door Lights.

  4. #34
    My friends think I'm nuts jawn101's Avatar
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    Question about A/C Panel Lights - Not coming on as normal

    Unfortunately on my car there isn't one. This was changed to support Dave's dome module. So I have a yellow wire that receives key-on signal from the Lg/W wires in the resistor. This is also not working, but Dave originally attributed it to a failed dome light module (I do not currently have one installed and am waiting on the mail to bring me a new one)

    Are you sure the original dome light module had a Lg/W wire? I don't see it on the schematic.
    Jon
    1981 DMC-12 #02100. July 1981. 5-speed, black, grooved w/flap.
    restoration log, March 2011 to present
    full and detailed photo restoration log

  5. #35
    Senior Member DMC5180's Avatar
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    I honestly think you have an issue with the Butt splice.


    Sent from my iPhone using Tapatalk
    DENNIS

    VIN 5180, Frame 3652, STAGE II​, DM-eng Solid State Solutions (RPM Rly, Dm.Lt.Mod., Fan Fail Mod. , FAN Rly, HS.Rly) , HID headlights, SPAX user since 2009, Eibach springs, M Adj. Rear LCA's, DPNW poly-sway bar kit, DMCEU LCA Stabilizer link kit, DMCMW Illuminated door sills, Aussie Illuminated SS Shifter plate, REAL MOMO EVO Steering wheel, DELOREANA Extended View Side Mirrors w/ Heaters, DELOREANA LED Door Lights.

  6. #36
    My friends think I'm nuts jawn101's Avatar
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    Question about A/C Panel Lights - Not coming on as normal

    Quote Originally Posted by DMC5180 View Post
    I honestly think you have an issue with the Butt splice.


    Sent from my iPhone using Tapatalk
    But in my defense there, I confirmed continuity from the Lg/W pin of the resistor to the Yellow pin of the dome light module, and it's a double-crimped barrel and I only modified one of the two wires - so I should still see something from the other wire. I can try carefully taking it apart and re-crimping but that's not my preference, the wires are very short and I can't really spare to cut it out altogether.
    Jon
    1981 DMC-12 #02100. July 1981. 5-speed, black, grooved w/flap.
    restoration log, March 2011 to present
    full and detailed photo restoration log

  7. #37
    Senior Member DMC5180's Avatar
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    Quote Originally Posted by jawn101 View Post
    But in my defense there, I confirmed continuity from the Lg/W pin of the resistor to the Yellow pin of the dome light module, and it's a double-crimped barrel and I only modified one of the two wires - so I should still see something from the other wire. I can try carefully taking it apart and re-crimping but that's not my preference, the wires are very short and I can't really spare to cut it out altogether.

    The way I see it, you have a BUTT splice which means the LG/W wire was cut to install it. With a single LG/W wire on one end and a single LG/W + Yellow on the other side. If the crimp on the single wire side failed it would cut power to the opposite side.

    I know its bugger but your going to need to check it. Do you have a needle pointed Test light that you can poke into the wire insulation of LG/W single wire out of the splice?
    Last edited by DMC5180; 04-28-2017 at 08:49 PM.
    DENNIS

    VIN 5180, Frame 3652, STAGE II​, DM-eng Solid State Solutions (RPM Rly, Dm.Lt.Mod., Fan Fail Mod. , FAN Rly, HS.Rly) , HID headlights, SPAX user since 2009, Eibach springs, M Adj. Rear LCA's, DPNW poly-sway bar kit, DMCEU LCA Stabilizer link kit, DMCMW Illuminated door sills, Aussie Illuminated SS Shifter plate, REAL MOMO EVO Steering wheel, DELOREANA Extended View Side Mirrors w/ Heaters, DELOREANA LED Door Lights.

  8. #38
    My friends think I'm nuts jawn101's Avatar
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    Quote Originally Posted by DMC5180 View Post
    I honestly think you have an issue with the Butt splice.


    Sent from my iPhone using Tapatalk
    Well, shut my mouth. I carefully crushed the splice backwards so I could remove it without cutting more wire and installed a brand new, smaller gauge one. Now the A/C panel lights come on no problem with the key!!!

    Thanks Dennis
    Jon
    1981 DMC-12 #02100. July 1981. 5-speed, black, grooved w/flap.
    restoration log, March 2011 to present
    full and detailed photo restoration log

  9. #39
    Senior Member DMC5180's Avatar
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    Quote Originally Posted by jawn101 View Post
    Well, shut my mouth. I carefully crushed the splice backwards so I could remove it without cutting more wire and installed a brand new, smaller gauge one. Now the A/C panel lights come on no problem with the key!!!

    Thanks Dennis
    Happy to assist

    CASE CLOSED
    Last edited by DMC5180; 04-28-2017 at 09:13 PM.
    DENNIS

    VIN 5180, Frame 3652, STAGE II​, DM-eng Solid State Solutions (RPM Rly, Dm.Lt.Mod., Fan Fail Mod. , FAN Rly, HS.Rly) , HID headlights, SPAX user since 2009, Eibach springs, M Adj. Rear LCA's, DPNW poly-sway bar kit, DMCEU LCA Stabilizer link kit, DMCMW Illuminated door sills, Aussie Illuminated SS Shifter plate, REAL MOMO EVO Steering wheel, DELOREANA Extended View Side Mirrors w/ Heaters, DELOREANA LED Door Lights.

  10. #40
    Senior Member DMC5180's Avatar
    Join Date:  May 2011

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    Quote Originally Posted by jawn101 View Post
    Unfortunately on my car there isn't one. This was changed to support Dave's dome module. So I have a yellow wire that receives key-on signal from the Lg/W wires in the resistor. This is also not working, but Dave originally attributed it to a failed dome light module (I do not currently have one installed and am waiting on the mail to bring me a new one)

    Are you sure the original dome light module had a Lg/W wire? I don't see it on the schematic.

    No, I think that was an incorrect statement on my part. I have all my relay wires bundled up with Zip-ties and there is one LG/W wire that crosses from the front Relay bank to the Rear relay bank. For some reason I thought it went to the DLM. That said, I may have had some LG/W wire lying around when I did DAVE's DLM and used it instead of the Yellow wire you mentioned. You are correct, it is not shown on the Schematic.
    DENNIS

    VIN 5180, Frame 3652, STAGE II​, DM-eng Solid State Solutions (RPM Rly, Dm.Lt.Mod., Fan Fail Mod. , FAN Rly, HS.Rly) , HID headlights, SPAX user since 2009, Eibach springs, M Adj. Rear LCA's, DPNW poly-sway bar kit, DMCEU LCA Stabilizer link kit, DMCMW Illuminated door sills, Aussie Illuminated SS Shifter plate, REAL MOMO EVO Steering wheel, DELOREANA Extended View Side Mirrors w/ Heaters, DELOREANA LED Door Lights.

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