Dashboard gauges turn off and on
A bad connection could be it, possibly a failing relay. One would have to pull some paneling off, possibly the steering wheel covers, to start looking for the problem.
Coming out of the ignition switch will be a start wire, an accessory wire, and a run wire. The run wire is for both the ignition system and for the gauges and warning lights. One splice of this run wire will go to the fuse panel, to power up those fuses that are termed "hot in run or accessory". Or sometimes, the run wire energizes a relay that sends power to the fuse panel. One of these fuses will be for the gauges and warning lights in the dash.
If you have a test light or voltmeter, you could check the fuse terminals for power at those times when the gauges are not working. If the fuse terminal shows no power when the key is on, then the problem is between the ignition switch and the fuse panel. This could be a relay that is not working- probably called an ignition relay-and it may be right around the fuse panel. If the fuse terminals do have power when key is on, but gauges are not working, the problem is between the fuse panel and the dash-will probably need to pull the dash cluster out to look further-possibly the electrical connector or connections at the cluster. If you wiggle the wiring around the fuse panel and the ignition switch and see the gauges move (key on), then you are wiggling a bad connection and can find and fix it.
Sep 06, 2013 |
Mazda Cars & Trucks