While attempting to change stereo on my volvo 940 turbo I cut wire harness now headlights wont come on

Hi Kacie.

Pretty much the only thing to do is remove the harness you spliced into the incorrect harness and use crimp connectors (the GOOD ones, not those cheap plastic blue ones) to match wire-for-wire and restore the original circuitry. THEN have at the correct harness and reinstall the stereo wiring. It's a PITA all right, but it really is the best way to fix your problem.

Sorry about the bad news...
-Steve

bulb failure warning relay has failed.behind your front ashtray last relay on the left .round one change it try on ebay.

You get the Wire Connector & Pig Tail-- to
replace the damaged one & Solder & Heat
shrink it on

Auto Parts Store
Online
Dealer
Salvage Yard

I can get you the wiring diagram - shoot me an email at http://www.google.com/recaptcha/mailhide/d?k=01UdpUKOVFe6ggXtroGQ8peA==&c=OTjo86GdQBZZLc_ZSAjzjJGcOw0SXf1z26PeNftYkXY=
I have the full color diagrams available

1994 Volvo 940 Car Audio Wire Diagram
Car Radio Battery Constant 12v+ Wire: Yellow
Car Radio Accessory Switched 12v+ Wire: Red
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Light Orange
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 5 1/4′
Car Audio Front Speakers Location: Doors
Left Front Speaker Positive Wire (+): Blue/Yellow
Left Front Speaker Negative Wire (-): White
Right Front Speaker Positive Wire (+): Gray/White
Right Front Speaker Negative Wire (-): Gray
Car Audio Rear Speakers Size: 6′ x 9′
Car Audio Rear Speakers Location: Rear Deck
Left Rear Speaker Positive Wire (+): Yellow/Brown
Left Rear Speaker Negative Wire (-): Yellow/Green
Right Rear Speaker Positive Wire (+): Green/Brown
Right Rear Speaker Negative Wire (-): Green

Hope helps (remember rated this) TY for use Fixya.

Turbo or non turbo engines are 2.3 liter.

Check the wire harness next to the tailgate hinge. The wires should be broken inside the harness.

I am a volvo tech and your problem is fuel pressure ralated and i had same problem in 1995 850 turbo and the fuel pump was the problem and a used one is around 35.00

I had a issue with my cruse control. Look under the hood. The the wire to the diaphragm for the crues might have popped off the throttle pully!

Check the fuel pump relay (white inside and back of fuse area behind the cig ashtray). They get old and quit.

Second, check frayed wires on the crank angle sender - they could be grounding out on the rear of the engine.

Perform a check on the ECT switch (toward rear of head under the intake manifold (hidden over the oil trap). It's a nuckel buster to remove, and ou don't want to break it.

Also check spark plugs for wear and gap. Check coil wire, and plug wires for jumping spark.