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I have a combo car battery jumper/air compressor. I can charge the air compressor; the battery jumper put out 0 volts. I dismantled it to see what is inside. There was, for lack of a better term, what appeared to be a large diode that showed no flowing voltage. The rechargeable battery showed volts. What is that thing? Is it a protection circuit?

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Yes it is protected if it is ul listed
check for fuse
replace that diode if no continuity is present

Posted on Jul 29, 2010


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The Battery needs to be disconnected from the vehicle cables but can be charged on the vehicle.

There is a toggle switch under a plastic cover in the rear cargo area. You can shut off the Air-ride but it is not recommended to drive it shut off. All of the news is not bad, one single sensor or switch can fix the entire system. Getting the Air compressor to stop running has a good possibilty of fixing the power drain for good.

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