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1986 Volvo 740 ECU wiring

Help, Advice, Owners' Discussion and DIY Tutorials on all Volvo's "mid era" rear wheel drive Volvos.

1975 - 1993 240
1983 - 1992 740
1982 - 1991 760
1986 - 1991 780
1990 - 1998 940
1990 - 1998 960
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slm987
Posts: 18
Joined: Fri May 02, 2014 5:53 am
Year and Model: 2000 C70
Location: Illinois

1986 Volvo 740 ECU wiring

Post by slm987 »

Hey guys! My 740 more or less tried to commit suicide :lol: and torched a lot of the wiring coming from the ignition coil into the cabin. I know how to get the wiring going to the fuse panel out. But how do I remove the harness coming from the engine bay to the inside of the car? I want to tape that up and make sure what I can't see isn't burnt.
slm987
Posts: 18
Joined: Fri May 02, 2014 5:53 am
Year and Model: 2000 C70
Location: Illinois

Re: 1986 Volvo 740 ECU wiring

Post by slm987 »

Bump?
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93Regina
Posts: 2813
Joined: Sat Jan 18, 2014 7:11 pm
Year and Model: 93:240/940
Location: Sunflower State
Been thanked: 64 times

Re: 1986 Volvo 740 ECU wiring

Post by 93Regina »

slm987 wrote:how do I remove the harness coming from the engine bay to the inside of the car?
Ask Dave
slm987
Posts: 18
Joined: Fri May 02, 2014 5:53 am
Year and Model: 2000 C70
Location: Illinois

Re: 1986 Volvo 740 ECU wiring

Post by slm987 »

It's not the engine harness, it's the harness going back from the coil THROUGH the firewall and then to the ECU and fuse panel. I wish it was as easy as the engine harness.
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93Regina
Posts: 2813
Joined: Sat Jan 18, 2014 7:11 pm
Year and Model: 93:240/940
Location: Sunflower State
Been thanked: 64 times

Re: 1986 Volvo 740 ECU wiring

Post by 93Regina »

slm987 wrote:harness going back from the coil
I don't own a 700 series Volvo...but from looking at this thread, specifically that diagram, I must assume coil and powerstage wires are bundled with headlight wires. So, start disconnecting, or splice what's needed to be spliced.
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