Relay test

The easiest way to test a relay is to replace it with a known good relay. As a rule, this is how relays are checked at a service station. However, since there is not always a stock of all types of relays at home, the following technology is recommended for checking the so-called working relays, which, among other things, are used to turn on the fog and headlights.

Pull the relay out of the block.

First, use a voltage tester to verify that there is voltage at terminal 30 of the relay block. To do this, connect the probe to ground, and insert the other end into the socket of terminal 30. If the probe's LED lights up, voltage is present. If there is no voltage, look for open circuit from battery positive to terminal 30 using the wiring diagram.

Make a jumper from a piece of wire, stripping its ends.

Connect this jumper to terminal 30 ((+) battery voltage is always present) with terminal 87 of the relay block. The location of the relay contacts is indicated on the relay and on the relay block.

If, for example, when the jumper is inserted, the main beam headlights light up, then the corresponding relay is defective.

If the high beam headlights do not come on, use the electrical circuit diagram to find and repair an open circuit from terminal 87 to the main headlights.

If required, install a new relay.