Rap Relay Test B: Rap Relay 1 Test

WARNING: This page is about a different car, the 1990 Cadillac Allante. However, it is still accessible from the selected car via links, so may be relevant.

B: RAP RELAY 1 TEST

Condition

Connect Between

⁽¹⁾ Correct Result

Connect Test Lamp At RAP Relay 1, Disconnected

5 (RED/YEL) & Ground

⁽²⁾ Test Lamp Lights

Connect Test Lamp At RAP RELAY 1, Disconnected

4 (RED) & Ground

⁽³⁾ Test Lamp Lights

⁽¹⁾	If results are correct, go to B: RAP RELAY 1 TEST TABLE 2

⁽²⁾	If result is incorrect, check RED/YEL (840) wire.

⁽³⁾	If result is incorrect, check RED (2) wire.

B: RAP RELAY 1 TEST

Condition

Connect Between

Correct Result

⁽¹⁾ BCM Display

Connect Test Lamp At RAP RELAY 1, Disconnected & Select BCM Output BO03

5 (RED/YEL) & 2 (BLK/WHT)

Test Lamp Lights

⁽²⁾ LO

Connect Test Lamp At RAP RELAY 1, Disconnected & Select BCM Output BO03

5 (RED/YEL) & 2 (BLK/WHT)

Test Lamp Does Not Light

⁽²⁾ HI

⁽¹⁾	If the BCM display does not cycle from LO to HI, replace the BCM.

⁽²⁾	If test lamp lights as shown, check RED/BLK (70) and RED/WHT (76) wires for an open or short to ground. Also check circuit breaker No. 21. If OK, replace RAP relay 1. If test lamp does not light as shown, check/repair BLK/WHT (707) wire for an open or short to ground.