Test Auxiliary Battery Relay
Charging System
A diagnostic test of the auxiliary battery relay (the switch that controls charging and discharge of the secondary battery) to confirm it engages and disengages properly. A failed relay prevents the auxiliary battery from charging or powering critical sys
Estimated Cost
$60–$140🔒
Parts + labor, based on the parts this service typically requires. Not specific to your vehicle or region — this spans all vehicles, all regions, and all part grades, so treat it as a rough ballpark rather than a quote.