Question about 1987 Chevrolet S-10 Pickup

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Wont start. ive replaced the fuel pump and the pump relays and it blows the ecm fuse every time i try to start it.

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I heard of the temp sensor shorting out, depening on engine size if it is a 4.3 it's on the drivers side...

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Jan 06, 2016 | Hyundai Cars & Trucks

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My 2000s10 keep blowing the ecm b fuse when i trun the key on

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 !

Mar 14, 2015 | 2000 Chevrolet S-10

1 Answer

Where is ecm on 95 gmc jimmy

The ECM on the jimmy, is located on the passenger side fender well by the overflow tank. But before replace the ECM, inspect the fuel pump and fuel pump relay. The ECM sends power to the fuel pump relay and if the relay has gone bad will cause the fuse to blow which will kill the the power to the ECM, in turn kill the electrical power to the ignition system.

Start by removing the fuel pump relay and swap it with another relay and see if the fuse will blow again, if is does. Disconnect the fuel sending unit wire harness at the frame and see if the fuse blows again, if the fuse stays good. Chances are your fuel pump has gone bad or the fuel filter is dirty/clogged causing your fuel pump to draw more amp and will need to be replaced or the wire harness from the frame to the sending unit has a short which is common on older Jimmy's.

Here is a link to the electrical harness throughout the Jimmy.

Mar 06, 2014 | 1988 Mazda B2200

1 Answer

1997 GMC Sierra, I keep blowing the ECM 1 fuse, I replaced Fuel Pump relay and Fuel Filter. Does the ECM 1 Fuse Pump the Fuel Pump, also disconnected the Fiter turned on the key and no fuel.

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
12900_oil_sending_unit_and_fuel_pump_circuit_80-yoo05im5qhid2i2poe1uh03c-5-0.gif this is for the fuel system, relay for the injector is nearly the same.

Nov 03, 2012 | 1995 GMC Sierra C1500

1 Answer


The key is to find out what is causing the ECM fuse to always blow. With just the key on try and see if any codes are set in the ECM. If not, try a new ECM. If the fuse still blows, then disconnect all accessible electrical for everything, including radios, accessories, relay boxes,etc. except the ECM. If the fuse still blows, then probably something wrong with the wiring to the ECM. If it doesn't blow then start hooking up things one at a time until it blows again. Once it blows, that is your problem.

Aug 24, 2017 | 1996 Chevrolet Suburban

2 Answers

1998 k1500 5.7L ecm-I fuse blows and wont start

Sounds to me its time to replace your ecm

Apr 04, 2010 | 1998 GMC Sierra

1 Answer

Will not start and checked fuel pump no power to fuel pump i also have blown fuse for ecmb that blows as soon as i replace it

ECM B fuse supplies a constant 12v hot at all times to the VCM/PCM and to the fuel pump relay. The fuse is blowing telling you that there is a short to ground somewhere. Try this, take the fuel pump relay out and put a new fuse in. If it doesn't blow put the relay back in and if it blows then try a new relay. The relay may be shorted to ground internaly. Other wise you'll have to trace the wires to the VCM and the pump relay to look for a chafed wire that's contacting metal. The wire coming from the ECM B fuse is orange and has a splice in it going to the pump relay and the VCM/PCM.
Hope this helps.....Andrew

Mar 28, 2010 | 1999 Chevrolet S-10 Pickup

1 Answer

97 chvy 5.0 -ECM B fuse blows - Wont Start - Replaced ALL parts

that red wire is a test lead to jumper the fuel pump to test it.if ecmb fuse keeps blowing my guess is your ecm has a short in it,in that case it can be purchased at oreillys

Mar 28, 2009 | 1997 Chevrolet C1500

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No Fuel 2001 Kia Sportage

dosee a KIA Sportage have fule pump reset and if so were is it ?

May 20, 2008 | 2001 Kia Sportage

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