1975 Wiring Harness repair - fix or delete seat sensor wiring |
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1975 Wiring Harness repair - fix or delete seat sensor wiring |
DaveB |
Jun 1 2022, 11:57 AM
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#1
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Member Group: Members Posts: 165 Joined: 25-November 21 From: Portland, Oregon Member No.: 26,107 Region Association: Pacific Northwest |
I just removed the wiring harness from my '75. I am not sure what the PO did or what happened but there are a lot of shorts with melted and exposed wiring. The seat wiring is melted into a large uniform mess.
I hate any form of lock out with seat belts. Can I remove the wiring and sensors or is there any reason I should restore the wiring under the seats and then make the modification to delete the lock out and fasten seat belt signals? I can't imagine a future owner thinking they would want to have the wiring available to connect a starter lock out to the seat belts. Thanks, DaveB |
JeffBowlsby |
Aug 29 2022, 06:00 PM
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#2
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914 Wiring Harnesses Group: Members Posts: 8,535 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None |
was there a formal campaign to fix the interlock system? Code?
Is there a list of items for the fix? --> Not to my knowledge. Only a guess but someone a long time ago seems to have figured out that the logic box simply interrupts ignition power and that the two big yellow wires carried that current. Connect them together and voila! Bypassed. Just wonder because the Current flow diagram in the Technical manual does not show the second relay, and the wiring connections are so different. However, it seems to me that a recall could have meant adding the second relay, and rerouting some of the wires as well as bridging the yellow power wires. I see one wire coming from a sleeved bundle to the seatbelts that is brown with a .110 terminal on it and a second wire heading up to the interior light. This terminal looks like it should go to terminal 31, but a short ground wire to a tab below the sockets is fitted there, and there is no other place I can see where this loose terminal should go. It is in three or 4 harnesses I am looking at. Dave --> Thats interesting, had no known that before. What are the two relays? Under the pass seat there is a seatbelt interlock logic box and the door open/fasten seatbelt buzzer. Neither are relays, but many call them that. --> This interlock system also ran through the end of the 1976 cars, including all the 1974-76 model year cars. --> I will need time to review this...have multiple harnesses in inventory and the factory schematic. May take me a couple weeks to respond. |
JeffBowlsby |
Aug 29 2022, 06:08 PM
Post
#3
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914 Wiring Harnesses Group: Members Posts: 8,535 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None |
was there a formal campaign to fix the interlock system? Code? Is there a list of items for the fix? --> Not to my knowledge. Only a guess but someone a long time ago seems to have figured out that the logic box simply interrupts ignition power and that the two big yellow wires carried that current. Connect them together and voila! Bypassed. Just wonder because the Current flow diagram in the Technical manual does not show the second relay, and the wiring connections are so different. However, it seems to me that a recall could have meant adding the second relay, and rerouting some of the wires as well as bridging the yellow power wires. I see one wire coming from a sleeved bundle to the seatbelts that is brown with a .110 terminal on it and a second wire heading up to the interior light. This terminal looks like it should go to terminal 31, but a short ground wire to a tab below the sockets is fitted there, and there is no other place I can see where this loose terminal should go. It is in three or 4 harnesses I am looking at. Dave --> Thats interesting, had no known that before. What are the two relays? Under the pass seat there is a seatbelt interlock logic box and the door open/fasten seatbelt buzzer. Neither are relays, but many call them that. --> This interlock system also ran through the end of the 1976 cars, including all the 1974-76 model year cars. --> I will need time to review this...have multiple harnesses in inventory and the factory schematic. May take me a couple weeks to respond. PS there is an early and late 1974 chassis harness. Early has cloth tape, late has vinyl tape and one has two wires to the MC switch, the other only has one (I forget which one is which at the moment) |
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