Question about 1988 Chevrolet Blazer
With a test light or voltmeter. One terminal at the relay would be hot at all times, if I am not mistaken. Or it might need key on to check for power. When key is turned on, there should also be a brief (2 seconds) signal at relay from computer to turn pump on and prime the system, but that signal will stop , and the power feed at relay would still be on.
Posted on Jan 20, 2013
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Posted on Jan 02, 2017
The best thing to do is to buy a Chilton,s repair manual. It has step by step procedures. You can get one at most auto parts stores. They coast anywhere from $10-$30 dollars.
Posted on Mar 16, 2009
first ... look in the fuse panel.. in the engine compartment near the battery for the fuel pump relay.... replace that... if still no sound from the fuel pump it has likely failed. use a meter to test for voltage at the fuel pump.... or use a car battery to apply voltage to the fuel pump directly... if it starts up the issue is elsewhere. to replace the fuel pump you will likely need to drop the fuel tank.
Posted on Apr 17, 2009
SOURCE: Where is the horn relay
horn is under the hood, usually on the firewa, how ever there us a horn relay somewhere unfder the dash on drivers side, pull it and makes sure it makes a clickin sounn if u hook power to it
Posted on Jul 16, 2009
CHECK FUSE + RELAY TO FUEL PUMP.IF THEY CHECK OUT GOOD.YOU HAVE PCM PROBLEMS. MAKE SURE PCM FUSE IS GOOD.YOU CAN BUY A HAYNES REPAIR MANUAL.IT HAS ALL OF YOUR ELECTRICAL DIAGRAMS.
Posted on Nov 11, 2009
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