Problem resolving an Electrical Issue on my 1988 Blazer 4.3L:
These items are NOT functioning: radio; cigar lighter; instrument panel lights; dome light and dome light in rear
These items are functioning: wipers; instrument gauges; power windows; door locks; exterior lights
Radio went out first with the dome lights and cigar lighter and the instrument lights went out a month or so later.
Checked all fuses-- good
Pulled radio and powered up light on radio with external power--good
Engine runs a little rough but running
With all doors closed removed bulb from dome light and checked across terminals. I am getting aclosed circuit.
Same result with the rear dome light across terminals. Checked continuity of the toggle switch on rear dome light switch is good.
Could this be the ECM board? Or a grounded wire? If a grounded wire any particular wire more likely
Monday, January 28th, 2013 AT 8:24 PM