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Wiring diagrams ?[700/1989] posted by Kenny on
Saturday, 3 July 1999, at 10:33 p.m.
Hi !
Does Brick board have any wiring diagram archives ?. I am specifically looking for Ignition wiring
diagram for the 760GLE (1989). I seem to be having this terribly annoying problem of the engine
cutting off in the middle of driving. (no spark). While it is clear to me that the most likely area would
be the ignition circuits, it's baffling........ I had taken the car to the Volvo dealer and they said "short
of replacing parts (and thus accumulating hours and hours of labor charges !) there is no easy way to
identify an intermittent problem like that ........"
The problem is not temp. related, have not been able to identify any sort of a pattern. (does it even
a minute after a cold start, or after driving for hours). The problem sometimes does not manifest
(i.e., engine does not shut off ) for a few days.........
While driving, the engine abruptly cuts off (no stalling gradually or stopping due to fuel starvation),
the dash lights come on. The engine remains crankable always. Sometimes the engine will start right
away, sometimes upto 25-30 cranks to start the engine. The car has 225K miles.
Any help would be grately appreciated !
Kenny.
Re: Wiring diagrams ?[700/1989] posted by abe crombie on
Sunday, 4 July 1999, at 1:39 a.m.
On the left inner fender behind air cleaner box is the power stage. This is the amplifier that takes low amperage signal from Ign computer and amplifies it to ground and open coil for spark. Disconnect the plug and inspect for any signs of corrosion.
The flywheel speed pickup which is atop the bell housing behind V of engine has a three wire connector that may also be trouble if it is not making a very good electrical contact. The ignition switch could be the trouble. You could detect a bad switch by moving the key a few degrees either way as engine is acting up.