1997 yukon, keep blowing ECM - 1, 20 amp fuse under hood . I had replace fuel pump a few months back, could it be a bad connection on the fuel pump?

That fuse ECM B also power's the fuel pump an fuel injectors ! It the under hood fuse / relay box ,pull out the fuel pump relay then put fuse ECM B back in an see if it still blows , You could have a shorted injector or fuel pump or the relay !

Most likely a short in the blower wiring or a bad blower motor.

Did you check the crank sensor wire, it may be hitting the hot exhaust. does the wire going to fuel pump have a problem and is shorting out. ECM 1 ..... then there are 5 components that this fuse feeds
1-crank sensor
2- all injectors
3- ECM
4- electronic ignition control module
5- ignition coil - check for a bad wire in these areas. Hope this helps.

ecm1 is injectors not fuel pump ecm-b is fuel pump its more likely to be a faulty relay for the injectors, it would be a similiar design to this
this is for the fuel system, relay for the injector is nearly the same.

This normally happens due to short in the wirings.Or if someone has connected a stereo or some other electrical contrivance to the wiring harness (bundle), either under the dash or under the hood.To confirm this unplug the fuel pump wiring connections and insert new fuse.Then start the car and see,if still the fuse blows then its a short in wiring.But if the fuse does not blows then its faulty fuel pump relay or faulty fuel pump itself.So first replace the fuel pump relay and see,if the fuel still blows then its faulty fuel pump.But if the fuse not blowing then relay was the faulty part.The fuel pump relay located on the fuse box under the hood.---------This troubleshooting tips will help you locate the fault and solve it.-------Thanks.Helpmech.

The twenty amp maxi fuse in the under the hood fuse panel goes to, you guessed it, the fuel pump. It sounds to me like you have a short to ground in the wiring that keeps popping this fuse. Find and fix the short, or you will keep blowing fuses.

this problem is most likely caused by a fuel pump with high amp. draw on start up.use a amp meter.then replace fuel pump.

Have you verified voltage at the fuse and fuel pump relay. There is one fuse in the underhood fuse box.
Let me know.
Regards,

just fixed this problem, change your fuel pump module, fuel sending unit shorts out on fuel level swing arm blue wire... unfortinately you must replace it as unit because of the design, fuel pump and tank guage fuel level sending unit are a one peice item, fuel tank has to come out to change unit, about a $ 700.00 repair too... fuel pump module runs about 350 to 700 $ depending on aftermarket or factory, try to find one with a lifetime warranty even if it is $ 50.00 more worth it..labor is about $ 250 to $ 400 depending on shop labor rate... definate problem though I ahve no doubt, common problem on GM... please rate my help, thanks...

dear,


The fuse ecm b it tied to the fuel pump, PCM, and VCM.
Fuel pump could have an internal short
check it by the way...

regards,