Question about 1988 Volvo 740

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I want to hook up a pre-amp to my stereo in my 1988 Volvo 740 and I need a hot wire out of the fuse box. I can see the spare fuse location on the fuse box, but how do I connect the hot wire? The fuse box is in a very tight compartment in the dash and you can't see behind the box.

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Posted on Jan 02, 2017

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SOURCE: Stereo wiring harness diagram

google!! i found it!

Posted on Jun 20, 2008

  • 10 Answers

SOURCE: overdrive relay

Clean or replace the solenoid on the tranny itself.

Posted on Sep 17, 2008

  • 3 Answers

SOURCE: 1988 volvo 740 problems

Spray starting fluid in the intake manifold with the throat open. Then try to start. if it starts briefly then you have a fuel pump or fuel relay issue. If it does not start after spraying starter fluid then you have a spark issue. Check the ingnition stage module on the inner fender behind the air cleaner and/or swap the radio suppression relay on the radiator fluid reservior.

Posted on Oct 18, 2008

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SOURCE: compressing calipers to put on new brake pads on 1988 volvo 740

There is a tool available from most auto parts supply outlets, it is a plate that has a compression bolt through it, you slide the plate into the caliper, and tighten the bolt against the piston, then keep turning until the piston is all the way in. These are relatively inexpensive and good to have for next time.

hope this helps.

Posted on May 06, 2009

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SOURCE: Diagram of fuse panel

Go to this web sight and it's all there.

Posted on May 08, 2009

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1 Answer

My 1988 volvo 740 radio has blue, red,green, white, and black. what do they run?

Going from a factory stereo to an after market. Some times you have extra wires. If the radio works, tape the ends and stuff them back in the hole.

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Where is the fuse box located on a volvo 740 1991 model

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Aug 08, 2010 | 1991 Volvo 740

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1989 Volvo 740 audio fuse 26 blowing

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Have you checked the fuel pump relay and fuse? That lives in the relay/fuse panel under the radio, behind the ash tray. I always carry a spare relay and fuse. The pump might have taken out both of these, The fuel pump relay is located in the third row, toward the firewall, next to the last relay on the right. The first in that row is a big relay for the headlights. The fulk pump relay is located between that and the one on the right. There are only three relays in the last row.

Oct 21, 2008 | 1988 Volvo 740

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