Driving down i35w from Kansas to Castroville, tx and vehicle shut off (all electrical loss shut off) ecm-1 20 amp fuse and the Aux-A & Aux-B 30 amp fuses were blown. had vehicle towed to shop and they determined engine wiring harness has probably melted on hot part of engine and shorted out fuses. although they couldn't duplicate the short and replaced fuses and vehicle ran fine down to Castroville. Today I started it up and we were headed back out of town on the way back to Kansas and vehicle blew the 20 amp fuse to ecm-1 again
SOURCE: 2001 S-10, Blowing "ECM Batt" fuse after running for about 30 min
that fuse feeds power to fuel pump relay circuit that feeds pump could be defective pump,or damaged circuit wires that shorts out! and not a good idea to put higher fuse in circuit could cause more damage to circuit! but i know when your stuck, u do what it takes,so inspect circuit related to fuse,
SOURCE: Ignition coil keeps busting open
YOU EITHER HAVE A COIL DRIVER CIRCUIT WIRE SHORTED OR FAULTY ENGINE CONTROLLER(PCM)..CHECK NEAR TRANS DIPSTICK FOR ANY DAMAGED/MISROUTED WIRING..HAVE SEEN IGNITION COIL DRIVER CIRCUIT PROBLEMS WITH PCM'S IN THESE VEHICLES ALSO
SOURCE: When this started with the
Is this the 2.4L or 2.2L engine? Looking for the wiring diagrams just need engine size.
SOURCE: 1997 yukon keeps blowing ECM-1 fuse, 20 amp. Ran
Hi, here is what runs on the fuse: ECM, injectors, coil, MAP sensor, crank sensor, IAT sensor, EGR solenoid. Of these, only the EGR solenoid has a delayed operation. Recommend you disconnect the EGR solenoid to see if the fuse will hold up. The solenoid is next to the thermostat housing as shown below. If the fuse doesn't blow with the solenoid disconnected, replace the EGR solenoid. Please let me know if you have questions and thanks for using FixYa.
SOURCE: I have a 2004 Chevy
Many cars have the cooling fan on a thermostat or time delay, to allow it to run for a short period of time after the engine turns off, to cool the engine off. You may have just never noticed it before. So I wouldn't worry about that.
Your real problem is the blowing fuses, apparently you have a short somewhere in your wiring. Putting in bigger and bigger fuses is a great way to set fire to your wiring harness. It's possible that the wire is pinched or chafed somewhere, and perhaps when you hit a bump just right, it touches and shorts.
You may have to take this to the Chevy dealer or a GOOD independent shop to have them chase it down. Unless someone out there knows exactly what this is, it could be a tough one to find.
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