Question about 2001 GMC Jimmy
Repalaced air pump and both check valves. Pump not getting power. Found fuse behind battery blown. Replaced fuse an it blew again. I checked wire from fuse to air pump and it was OK. The pump is new and also checked OK. I need electrical schematic for other wires on this same fuse (circuit). This schematic is not in the Haynes book I'm using. Can you help?
The 30A pump fuse and the 10 solenoid fuse are dedicated. The only other fuse in the circuit is 175A @ the battery. Look under the A.I.R. fuse block for melting around the relay
Posted on Nov 24, 2008
You didn't mention the fuse rating of the one you replaced so this method may not help if it was higher than ~5 amps.At this point, I would wire a 12 volt bulb, preferably, one with 40-50 watts rating (headlamp will do fine) in place of the fuse that is blowing and start pulling likely connectors until the light goes out.
If you don't get results this way, you might try disturbing one bundle of wire after another since this could be happening because of insulation that has been pinched or worn through to reach ground.
Using a bulb instead of bridging the fuse with a piece of coathanger will prevent melting the wire and possibly compounding the problem.
Posted on Nov 24, 2008
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Posted on Jan 02, 2017
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