I need a wiring wizard
Thread Starter
Le Mans Master
Joined: May 2004
Posts: 5,866
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From: Hellinois
Finalist 2020 C4 of the Year - Modified
I need a wiring wizard
Let me say right off that wiring and I do not fare well together. I'm having a converter lockup issue. The converter does lock but it is just not right. Can anyone tell me where the wire in the "F" terminal of the aldl goes? By continuity testing it goes to B8 in the ecm. My car is an '85 but I upgraded to the 165 ecm. The wire in the B8 position is gray, it is supposed to be green/white and is supposed to go the a/c circuit. If someone can tell me where the "F" terminal wire goes I can most likely figure the rest out myself. I should add, I do have the fsm, ('85) and I have been all over it so if that information is in there I passed right over it.
Last edited by Midnight 85; Jun 21, 2017 at 01:41 AM.
Team Owner
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Let me say right off that wiring and I do not fare well together. I'm having a converter lockup issue. The converter does lock but it is just not right. Can anyone tell me where the wire in the "F" terminal of the aldl goes? By continuity testing it goes to B8 in the ecm. My car is an '85 but I upgraded to the 165 ecm. The wire in the B8 position is gray, it is supposed to be green/white and is supposed to go the a/c circuit. If someone can tell me where the "F" terminal wire goes I can most likely figure the rest out myself. I should add, I do have the fsm, ('85) and I have been all over it so if that information is in there I passed right over it.
From an '87 FSM
That seems to be the same as an '85. Look in your FSM 6E3-124 That should be CHART C-8 TCC (422 is noted as TAN/BLK in the wiring diagrams)
Last edited by WVZR-1; Jun 21, 2017 at 02:30 AM.
Thread Starter
Le Mans Master
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
I found the same thing but I cannot trust the fsm, there are at least 3 wires that in my original harness are not the color the fsm says they are. I compared my harness with an uncut used harness Jay had at Vette2Vette and my harness matched the one he has. He then told me that Gordon Killebrew told him that he told GM of the discrepancies in the unpublished fsm but GM printed them anyway. My concern is if I were to move the wire that shows continuity from B8 to the A7 terminal, what am I going to ruin if that is a wrong move?
Team Owner
Joined: Sep 2003
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I found the same thing but I cannot trust the fsm, there are at least 3 wires that in my original harness are not the color the fsm says they are. I compared my harness with an uncut used harness Jay had at Vette2Vette and my harness matched the one he has. He then told me that Gordon Killebrew told him that he told GM of the discrepancies in the unpublished fsm but GM printed them anyway. My concern is if I were to move the wire that shows continuity from B8 to the A7 terminal, what am I going to ruin if that is a wrong move?
The he said - he told him and he told me doesn't seem to hold much water! You're the guy with the problem
Post your pin-outs NOW! WHAT 3 do you feel are in error?
I'm accustomed to seeing B8 in AC signal and being GREEN/WHT usually or whatever
Compare yours to these and mention your differences. I ain't sayin' these are correct but I know many that have built harnesses using the information.
http://chevythunder.com/fuel%20injec...%20pinouts.htm
I have "all year" C4 FSM and I doubt that even IF GK mentioned errors they went undocumented/unchanged in future publications. GK is responsible for much "hear-say/Internet lore"
Last edited by WVZR-1; Jun 21, 2017 at 07:06 AM.
Thread Starter
Le Mans Master
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
I could have and as a matter of fact, did make mistakes when I did the upgrade, BUT B8 is not one of the wires that was involved in that. Let's say I did put the wrong wire in B8, why is the wire that comes from aldl terminal F gray when it is supposed to be tan/black? That is why I need to know where the wire in Term. F goes to regardless of color. If that wire truly does go to A7 then that is one more color mistake I have found in the fsm. The aldl wiring has never been touched. I'm going to have to get the car up on jacks and see what I can find in the tcc connector on the trans and also see if I can find the green/white wire coming from the a/c wiring that is supposed to be in B8
Team Owner
Joined: Sep 2003
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I could have and as a matter of fact, did make mistakes when I did the upgrade, BUT B8 is not one of the wires that was involved in that. Let's say I did put the wrong wire in B8, why is the wire that comes from aldl terminal F gray when it is supposed to be tan/black? That is why I need to know where the wire in Term. F goes to regardless of color. If that wire truly does go to A7 then that is one more color mistake I have found in the fsm. The aldl wiring has never been touched. I'm going to have to get the car up on jacks and see what I can find in the tcc connector on the trans and also see if I can find the green/white wire coming from the a/c wiring that is supposed to be in B8
Last edited by WVZR-1; Jun 21, 2017 at 08:29 AM.
Thread Starter
Le Mans Master
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
That's what has me puzzled, there is a tan/black wire in A7 BUT, it does NOT show continuity to F on the alcl. F as I said shows continuity to B8. I'm going out now to get under the car and trace from there, probably won't be back on here until later tonight.
Thread Starter
Le Mans Master
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
I have good contact with all wires at all components now and I put a new lockup solenoid in just in case the other one was weak. I'll finish it up tomorrow.
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Thread Starter
Le Mans Master
Joined: May 2004
Posts: 5,866
Likes: 60
From: Hellinois
Finalist 2020 C4 of the Year - Modified
You are correct, but can you imagine how confused a electrical dummy like me could get really screwed up? If it weren't for my multimeter I would still be scratching my head. One instance I recall was the fsm calling for a green wire when the wire that showed continuity was brown. I had the same thing that involved a gray wire but I can't remember now what that was.