IGN A Fuse Keeps Blowing
February 23rd, 2020, 12:42 PM
#1
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IGN A Fuse Keeps Blowing
1997 Chevy C2500 5.7 Vortec
Weird issue that I'm hoping someone can help me with.
The IGN A 40amp maxi fuse keeps blowing every time I turn the key to the On position. I tried pulling the connector from the camshaft position sensor, map sensor, etc and nothing changed. I even tried disconnecting the starter and it keep popping the fuse.
Finally figured out that if I pull the "Eng 1" mini 20amp fuse, the voltage goes away and the 40amp fuse doesn't blow. The 20amp Eng 1 fuse never pops in any of these scenarios.
If anyone has any ideas, I would appreciate it. I'm not the best at troubleshooting something like this.
Weird issue that I'm hoping someone can help me with.
The IGN A 40amp maxi fuse keeps blowing every time I turn the key to the On position. I tried pulling the connector from the camshaft position sensor, map sensor, etc and nothing changed. I even tried disconnecting the starter and it keep popping the fuse.
Finally figured out that if I pull the "Eng 1" mini 20amp fuse, the voltage goes away and the 40amp fuse doesn't blow. The 20amp Eng 1 fuse never pops in any of these scenarios.
If anyone has any ideas, I would appreciate it. I'm not the best at troubleshooting something like this.
February 23rd, 2020, 3:23 PM
#2
I'd recommend getting a Hanes manual or something with electrical schematics, and a multimeter. See which components are connected to the IGN-A fuse, and which ones have the ENG1 fuse in common, and that should give you a clue where your short is.
http://www.bbbind.com/tsb-wiring-diagrams-database/
http://www.bbbind.com/tsb-wiring-diagrams-database/
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