Question about 1996 Chevrolet Blazer
ECM B FUSE blows when turn key on. when remove fuel pump relay and turn key on fuse does not blow. replace relay fuse ok until turn key off or try to crank engine
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Posted on Jan 02, 2017
SOURCE: my ecm 1 fuse blows
The diagram below shows everything that runs on that fuse. Check the wiring on these items for a short. If wiring is good, there is a simple way to see which item is shorting out. Unhook all the connectors (don't unhook the VCM) and put a fresh fuse in. Turn the key on--does the fuse still blow? If yes, there is a short in the wiring. If no, the short is in one of the items you unplugged. Now pulg them back one at a time with the key on. Check the fuse after each item until it is burned. Then you will know which part to replace. My first guess would be the coil. Let me know if you can't find any of these or if you have other questions.
Posted on Dec 07, 2010
if it is the ecm b fuse thats blowing i would try disconnecting your oil sending unit and see if it still blows the fuse.i have seen the sending unit short out internally before and blow the fuse.if it is the ecm 1 fuse it is either a chaffed wire or one of your injectors shorted.
Posted on Feb 09, 2011
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