2007-06-28 13:15:44 · 4 answers · asked by Shawn R 1 in Cars & Transportation ➔ Maintenance & Repairs
Take your multi meter on DC volts & connect the red lead to the negative post & black to the engine block. Have someone start the truck (if you don't have a remote starter button). Over .5 volts shows bad. continue same routine moving one of the leads closer to the other until you isolate the bad spot. If all connections are good you meter won't read extra voltage. If one of the connections are bad the meter will read the voltage that is bypassing the bad connection.
Good luck.
2007-06-28 17:43:03 · answer #1 · answered by gejandsons 5 · 0⤊ 0⤋
Ron and John are both correct. Keep in mind, some things ground to the engine, some to the frame, and some to the body. Thus, all of those need to have a good connection to the battery negative terminal. An open ground can be found with a test light, whereas a weak ground needs a voltmeter. You are testing for a voltage drop. If the battery voltage is 12.5 across the terminals, then it should be same between the negative and the engine, frame, and body. If any of them show less, there is a poor connection. Be it a bad cable, loose screw, or corrosion.
2007-06-28 21:13:59 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Do you own a volt meter? set it to DC volts 24v. Connect a red end volt meter to the battery terminal and black to the body of the car see voltage? Then you found the first bad ground. Voltage drop testing can be done on the positive side too. Many GM batterys leak onto the terminals and take out the battery cables. Take the connectora apart and make sure the connections are clean copper colored.
2007-06-28 20:23:52 · answer #3 · answered by John Paul 7 · 0⤊ 0⤋
with a test light
2007-06-28 20:22:12 · answer #4 · answered by Ron B 6 · 0⤊ 1⤋