Defogger Relay

Disconnect defogger relay. Using an ohmmeter, check for continuity between terminals No. 1 and 2 on defogger relay. See Figure. If continuity exists, proceed with test. If continuity does not exist, replace defogger relay. Check terminals No. 3 and 4 of defogger relay with ohmmeter for continuity. If continuity exists, replace defogger relay. If continuity does not exist, proceed with test. Using fused jumper wires, attach terminal No. 1 of defogger relay to battery voltage and terminal No. 2 to battery ground. Using an ohmmeter, check terminals No. 3 and 4 of defogger relay for continuity. If continuity does not exist, replace defogger relay. If continuity exists, defogger relay is operating at this time.