Having problems with your 1986 Ford F 250 ?
My 1986 f350 6.9s glow plug system does not work at all.the light in the dash that comes on when the glo plugs are warming up does not light up at all,what does this sound like?
Glow plug setups usually have a relay to handle the high current required to power the glow plugs. This relay could be faulty, preventing operation. It may be possible to swap a relay from another circuit to isolate the problem.
Repair Help & Product Troubleshooting for 1986 Ford F 250
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