1997 GMC Jimmy 6 cyl Four Wheel Drive Automatic 178000 miles
My entire electrical system is pulsating. Dash lights, headlights, fuel gauge, everything. The voltage meter on my dash shows the system charging at 16+ volts, but a handheld meter attached directly to the battery shows a steady 13.5 volts. OK, so my dash volt meter is inaccurate, but what would be causing the system to pulsate? The alternator checks out OK. I just had the fuel pump replaced. Could it be a bad ground somewhere? We also have had sub-zero temperatures which is hard on the battery, but it is very new and load tests OK. I'm baffled... Any ideas would be very appreciated.
have the same problem?
Saturday, January 9th, 2010 AT 4:40 PM