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Car Forum / Volvo Cars / July 2007'87 760T lock/ABS fuse blowing
My brother has a 760 Turbo which started blowing the fuse for the power locks and ABS system. At first he couldn't tell when it was blowing, it would just randomly do it, sometimes after driving for days, sometimes within hours. One day he heard it blow after unlocking (or locking?) the doors, then today he put one in and it blew instantly. I'm suspecting a chafed wire in the door lock system but does anyone have other ideas? > My brother has a 760 Turbo which started blowing the fuse for the power > locks and ABS system. At first he couldn't tell when it was blowing, it > would just randomly do it, sometimes after driving for days, sometimes > within hours. One day he heard it blow after unlocking (or locking?) the > doors, then today he put one in and it blew instantly. I'm suspecting a > chafed wire in the door lock system but does anyone have other ideas? On an '87 I'm still thinking about crumbling wiring. That sort of shifts suspicion to places where the wiring goes under the hood or anywhere outside the cabin. Mike >> My brother has a 760 Turbo which started blowing the fuse for the power >> locks and ABS system. At first he couldn't tell when it was blowing, it [quoted text clipped - 8 lines] > > Mike That's a thought, I certainly had to redo the engine harness on mine, I haven't had any trouble with the lock or ABS wiring though, I don't think much of it even goes under the hood since the ABS system is in the trunk of the early cars. Wagon or four-door? If a wagon, check the wiring bundle at the tailgate hinge. That gets a lot of flexing. '87 and earlier 760s weren't known for good insulation. I'd suspect a short there or at one of the other door hinges. These shorts can be hard to find. there's a $20 gadget here -- http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=94181 -- that might help. I haven't used it. If anyone has, I'd be interested to hear how it worked. Pete (fP) > My brother has a 760 Turbo which started blowing the fuse for the power > locks and ABS system. At first he couldn't tell when it was blowing, it > would just randomly do it, sometimes after driving for days, sometimes > within hours. One day he heard it blow after unlocking (or locking?) the > doors, then today he put one in and it blew instantly. I'm suspecting a > chafed wire in the door lock system but does anyone have other ideas? > Wagon or four-door? If a wagon, check the wiring bundle at the tailgate > hinge. That gets a lot of flexing. '87 and earlier 760s weren't known for [quoted text clipped - 5 lines] > > Pete (fP) It's a sedan, though I suppose it's worth checking the trunk lock wiring. I actually have a nice Harris cable tracer, not sure how useful it would be in a car though as the color codes are usually sufficient. I'm a little curious how well the Harbor Freight one works since the cost is a fraction of what I paid for mine. The point of the cable tracer is that it will identify a short, ideally through a bundle of other wires and maybe some panelling. The theory is that you push a radio signal into the lead in question and run a tuned tracer along its general direction. When the signal stops, you've (theoretically) found the place where the signal jumps to ground. Of course, with an intermittent short, you'd have be wiggling the right wires in the right way and in the right place to get any sort of diagnostics out of it. Pete >> Wagon or four-door? If a wagon, check the wiring bundle at the tailgate >> hinge. That gets a lot of flexing. '87 and earlier 760s weren't known for [quoted text clipped - 12 lines] > curious how well the Harbor Freight one works since the cost is a fraction > of what I paid for mine. |
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