What can a bad relay cause?
The wrong relay can cause a short or a power surge that can damage your vehicle’s electrical system. Handle the relay gingerly and try to avoid dropping it. If the relay is damaged internally, it can cause burning or melting of wiring. Also avoid modifying the relay in any way.
What causes a relay switch to go bad?
Even in low-level signal applications, accidents and faulty UUTs can cause relay failures, and inrush currents, caused by hot-switching capacitive loads, and voltage spikes, caused by hot-switching inductive loads, accelerate relay aging.
What are the symptoms of a bad fuse or relay?
Specifically, when the fuses and relays of the ABS system fail, usually the vehicle will display a few symptoms that can alert the driver that there may be a problem with an ABS fuse or relay. 1. Illuminated ABS Light One of the first symptoms of a blown fuse or relay is an illuminated ABS Light.
How can I tell if my DC relay has blown?
With the relay removed from the fuse box, the multimeter set to measure DC voltage and the switch in the cab activated, first check to see if there are 12 volts at the 85 position in the fuse box where the relay plugs in (or wherever the relay is located). If there isn’t, check to see if the appropriate fuse has blown.
What’s the best way to check a relay?
Using a multimeter The only tool required to check a relay is a multimeter. With the relay removed from the fuse box, the multimeter set to measure DC voltage and the switch in the cab activated, first check to see if there are 12 volts at the 85 position in the fuse box where the relay plugs in (or wherever the relay is located).
Can a bad fuse cause an ABS system to malfunction?
Another symptom of a possible problem with a fuse or relay is a malfunctioning ABS system. More specifically, a failed relay may cause the ABS symptom to act up. If the relay is unable to adequately supply the ABS system’s electrical needs, it may cause the system to malfunction.