Low-Side = Ground Switching, where lights receive Ground from the switch/control and the other side of the light is supplied 12V from the OE's harness.
* Are the 12VDC lights incandescent, halogen or L.E.D.? If so, please proceed to #2. If not, the dimmer cannot be used.
* How are the lights currently wired - Does the switch supply power or ground to the light(s)?
* Depending on the answer to #2, are you able to supply a ground source to the dimmer control? If so, please review to choose the high-side and low-side dimmer controls on the website. If you cannot easily supply a ground source to the dimmer control, I recommend using a 2-wire control for ease of install. Note however, the performance of a 2-wire dimmer with L.E.D.s is not nearly as effective. The 2-wire part numbers are AH-SLD-X-001 & AT-RLD-X-01, where "X" = color.
* If the compass sensor has been or needs to be moved to a new location, you will have to recalibrate the compass after it has been moved. When the compass is being calibrated, as you turn in a circle, it locates the strongest magnetic reading (North) and the weakest magnetic reading (South), which should be 180 degrees apart.
* By doing this it can compensate for any magnetic interference caused by the surrounding metal body parts and electronics. IT cannot however compensate for changing magnetic interference such as that caused by a blower motor being turned on or off, or interference from powerful speaker magnets. You should try to mount the compass sensor in a location that is as far away as possible from these changing magnetic interference sources. Usually 3 feet away from most motors and speakers is sufficient.
* If the temperature display reads -40 degrees F the sensor or the harness has an open connection in it. If the temperature display reads 127 degrees F the sensor or the harness has a short in it.
* Make sure the harness connectors are tightly plugged into the display at one end and the sensor at the other end.
* Make sure the harness connectors are tightly plugged into the display at one end and the sensor module at the other end.
You must correct the problem causing the heading to flash before trying to calibrate the compass - see the next question for further assistance.
If your motorhome or trailer has a battery disconnect switch in it, make sure it is turned on.
* If the compass is wired to the house batteries and the disconnect switch is turned off the unit will not work. Verify that you have +12VDC ignition (switched) voltage on the Orange wire, and that you have a good chassis ground on the Black wire.
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