20 Most Recent JBL MR140 Questions & Answers


I haven't found a fuel gauge that didn't use a wire wound rheostat on the float arm in the tank to apply current to warm a bi-metal strip in the gauge. In my '89 Toyota van, my gauge would only work from 1/4 down. I had to take the tank out to work on the suspension and on removing the sender, I found the sliding contact loose on it's pivot and the coil coated with a white residue. With gentle tweaking and 600 wet-dry paper it works perfect. But I would first check if you are getting 12V to the sender on the tank. Keith L.

JBL MR140 | Answered on Mar 02, 2012


becuase china made it.

JBL MR140 | Answered on May 30, 2010


Bad or shorted voice coil on sub maybe. If you have two subs try them one at a time to see if it goes into protect mode. Whatever sub does it is bad.

JBL Car Audio &... | Answered on Oct 04, 2016


It is very dependent on your vehicle and whether you are using the built-in amp of the head unit or a separate amp. Ideally, I would recommend a good 6.5" component set.

JBL Car Audio &... | Answered on Sep 20, 2016

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