How To Fix A Ground Wire In A Car. Using sandpaper remove any rust from the connector and the contact area on the car body. If the ground wire is loose it may need to be reattached firmly.
The simplest way to check for a bad ground is to run a continuity test between the battery and the chassis. The battery to engine wire is there to ground the alternator. Twist the two sections of bare wire around each other.
Slip PVC shrink tube over one wire.
Using sandpaper remove any rust from the connector and the contact area on the car body. Reattach the ground connector to the body. Disconnect the negative battery cable and connect the probe ends of a digital multimeter -- set to read volts DC -- to the negative and positive battery terminals. The ground is a major part of the batterys charging system so assuming that youre getting proper voltage output from the alternator wire and the battery isnt hashed then you may be looking at a bad ground wire.
