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The fuse blows on the ecm - 1995 Chevrolet Blazer

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Sounds like a bad ground. In my 92 gmc i just put a larger amp fuse in it and it has been fine since. try moving it up by 5 amps only.

Posted on Dec 23, 2009

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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

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ECM-1 keeps blowing 1990 chevy astro


Without any schematic diagram it sounds like the ECM has a short in it or something the ECM is connected to. Without a schematic for your particular car it is difficult to tell you the EXACT proble. Blown fuses means you are overloading the fused circuit. Just make sure the fuse is the correct size. Thats the best i can do with the Information i have
Good luck

May 18, 2014 | 1990 Chevrolet Astro Extended

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I have a 1992 buick roadmaster..and after driving my car for a while,the fuse to the ecm blows..what could be the problem?


Early 90's GMs have had more than thier share of electrical problems. the problem with your Buick is not unheard of. The most common cause of the ECM fuse blowing is a short to ground in one of the ECM sensor circuits. So check all of the engine sensor connections and the sensors. Pay particular attention to wiring underneath the car. Could be the ECM is faulty, but fairly uncommon for this to be the case.

Jul 02, 2012 | 1992 Buick Roadmaster

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I have a 1990 Chevrolet C2500 Pickup. It keeps blowing the ECM fuse. Its not the ecm, its not the fuel pump, its not the fruel pump relay. What else could blow the ECM fuse?. There is no visual evidence of...


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.

Feb 09, 2011 | 1989 Chevrolet C2500

1 Answer

MY 96 SUBURBAN 2500 7.4L SUDDENLY DIED WHILE DRIVING. AFTER I COASTED TO A STOP I TRIED TO RESTARTING BUT NO LUCK. HAVING HAD THE FUEL PUMP REPLACED BEFORE I KNEW TO LISTEN FOR THAT SOUND OF THE PUMP...


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

1 Answer

I have a lhs 1996 Chrysler. The car wont start and the engine fuze burns out.


I also have a 96 LHS that randomly blows the 20 amp ECM fuse. If this is what you are referring to, the problem may be in one of your ECM sensors. 1-Start by unplugging all ECM sensors (Temp, Cam, Crank, 2-O2, TPS, etc.) and replace the fuse. 2-Crank the starter (the car will not start) and see if the fuse blows. If it does you probably have an electrical problem with the ECM. 2-If the fuse does not blow, plug in only the cam sensor and start the car; it will idle rough and the check engine light will come on. If the fuse blows, the problem is the cam sensor or wiring to it. 3-Continue plugging in sensors one at a time and try starting. When the fuse blows, you will know which sensor and/or wiring to the sensor to check. This process of elimination has worked twice for me.

May 16, 2010 | Cars & Trucks

1 Answer

Blown ecm fuse


unhook the ecm and check if the fuse does not blow,you will know if it is the ecm,Hope this helps

Sep 06, 2009 | 1988 Chevrolet S-10

1 Answer

Ikeep blowing the ecm fuse as soon as i turn on the ignition and when i hoo up the positve cable to the battery i get a big spark


CHECK FOR IGNITION WIRES SHORT TO GROUND.I HAVE SEEN A BAD FUEL PUMP BLOW ECM FUSE.REMOVE THE FUEL PUMP FUSE DISABLE FUEL PUMP AND SEE IF FUSE KEEP BLOWING.

Sep 01, 2009 | 1994 Chevrolet Cavalier

1 Answer

Keep blowing ECM fuse on 90 honda accord


I'm thinking the ECM is bad and grounding out, causing the car to blow the fuse. The old gas wouldn't cause this problem.

May 27, 2009 | 1990 Honda Accord

1 Answer

ECM BATT fuse keeps blowing


That fuse provides power for the fuel pump. Either your fuel pump is blowing the fuse or there is a shorted wire.

Nov 22, 2008 | 1995 GMC Jimmy

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