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well I watch the motor and it would shake when the motor fan would kick on and when I turn the car heater on the motor shakes ,turn the lights on the motor shakes,turn them all off and the motor stop shaking to very little , so I think it’s the battery and so i go to a battery shop and every thing checks out ok ,the battery is a 2011 ,3years old ,so he is saying the battery is ok ,the car is charging ok and I can see that it’s charging good ,I told him that some of the sells lead look contaminated ,he would not use a light to look in so he could not see ,so, I am thinking we might be getting a false reading ,maybe the only way to know is to put a new battery in it ,witch I do not want to do ,so if I do not have the the heater fan on the motor dose not shake ,if I disconnect the motor fan the motor dose not shake ,or do not have the lights on the car motor dose not shake, so if there is no electric load on the motor the car dose not shake ,I am trying to not have to take it to a shop yet ,it’s drivable as is , the shaking dose bug me a bit,but I learn more today buy watching it and turning thing off that cause the motor to shake ,I thought it might be the fuel pump or injectors or some thing wrong with the new fuel filter I put on ,but it seems not :unsure:
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You could start with a visual inspection of your wiring harness. Obviously, start with your battery cables and check that they’re tight at both ends. Any green fuzzy/chalky stuff should be cleaned off of cables wherever you find it. Same goes for the rest of the harness. Keep your eyes open for any obvious signs of chafing, burnt wiring, chew marks from furry woodland creatures, etc… Then you can run the engine with something on that makes the car shake. Then try wiggling, pushing, pulling, or otherwise agitating the wiring harness. Any change in how the car runs should mean you’re in the ball park of a wiring problem. Remember to be mindful of exposed moving parts while you’re moving around under the hood. This here website, http://www.revbase.com/BBBMotor/Wd , gets you some factory wiring diagrams if you can use them. I don’t know much about the site except to say the few times I’ve tried it, it seems to deliver.
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