Question about 1977 Chevrolet Silverado 2500

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I reversed polarity when jumping the truck and now i get no power to start the truck but all the lights still work

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Replace the fuse links at the starter.

Posted on Sep 28, 2009

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1 Answer

Jump start reversed polarity now nothing


That sort of thing can badly damage management system, relays, melts connection, fuses. There is a fuse for the computer, check your manual. But get it diagnosed.

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Try resetting the CPU program as it may be corrupted from reverse polarity. Have the ECM checked out as reversed polarity tends to damage them internally.

Feb 02, 2014 | Cars & Trucks

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My wife has a Mazda tribute 02, she reversed the polarity while trying to jump her car. Now the interior lights, radio and power locks don't work. The battery also has a constant drain so I gave to jump it...


first the battery will drain if there is current draw
to check current draw with an ampmeter to battery
to find out the drain unplug fuse one at the time you will find the circuit
second the battery can hold the charge itself (crack,or short cell)
when reversed the polarity it give a good good shake

Oct 11, 2013 | Cars & Trucks

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Reverse polarity check list


start with ignition switch to starter components for power --look for short burnt connections and or components [ relays-solenoids etc ] if good may need to have computer checked

Apr 21, 2017 | Cars & Trucks

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Polarity was reversed when jump starting vehicle installed new battery & no power to anything mechanic said fuse got blown.What fuse,where it is located & cost of it.


Hard to say without make, year, and model-but check all fuses in the power distribution box under the hood- ignition, alternator fuse, etc.-all of them, the small ones and the maxi-fuses. All fuses are pretty cheap. If you still have nothing, you may need a wiring diagram to check for fusible links that would be power distributors right off or near the battery. Fusible links work much like a fuse, and most have been replaced by maxi-fuses, but many vehicles have both. If there is a designated main fuse, it should be in the distribution block or box under the hood.

Feb 06, 2013 | Cars & Trucks

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Reversed polarity on jump start. now wont go into gear or hold charge


OLder cars YEs you can jump it without a battery. But in newer cars that use computers and advanced Eltronic ignition/timing/ful injection you have to have power to the cars computer. without a good battery the car will not run.---------------------------------------------------------------------------------
Renault CAN Clip

Feb 01, 2013 | 2001 Kia Rio

1 Answer

Golf battery polarity


reversed polarity,check fuses. check the system for burnt wires also !
Always hook up your battery terminals correctly, as the alternator may be damaged if the battery is hooked up backward. jump start car, if it will. there should be at least 13.7 to 14.2 volts at battery posts while its running. if alternator is ok.

Nov 01, 2011 | Cars & Trucks

1 Answer

My 2005 toyota carolla, the battery died and when attemping to jump start it again, the polarity on the battery was reversed, after changing the alt fuse and ignition relay the car will start but none of...


sorry to say , get a voltmeter and go through the wiring starting at the fuse box and follow on from there, that includes the ground circuits, its time consuming but revesing polarity can cause untold damage

Nov 11, 2010 | 2005 Toyota Corolla

1 Answer

A friend reversed polarity when jump starting my car, now power door locks, radio, trunk release etc. don't work....Help please!!!


what has happened is that you have put 24 volts into the system instead of 12 volts & caused major damage to the electrics,most of them may need to be replaced.....hope this helps.....cheers

Jul 24, 2010 | 2002 Dodge Stratus

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