Relay Control Module Input Test

1.Remove the under -hood fuse/relay box under cover.

2.Disconnect the 10P connector (A) from the under -hood fuse/relay box (B).

3.Inspect the connector and socket terminals to be sure they are all making good contact.

  • If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
  • If the terminals look OK, go to 4.

4.With the connector still disconnected, make these input tests at the connector.

  • If any test indicates a problem, find and correct the cause, then recheck the system.
  • If all the input tests prove OK, the relay control module must be faulty, replace the under-hood fuse/relay box.

Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 
10 BLK Under all conditions Check for continuity to ground:
There should be continuity. 
  • Poor ground (G501, G601)
  • An open in the wire
 
8 YEL Ignition switch ON (II) Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 21 (7.5A) fuse in the under-dash fuse/relay box
  • An open in the wire
 
7 BLU Under all conditions Check for continuity between terminal 7 and the under-dash fuse/relay box connector D (17P) connector terminal No. 11:
There should be continuity. 
  • An open in the wire
 
Under-dash fuse/relay box connector D (17P) disconnected Check for continuity to ground:
There should be no continuity. 
  • Short to ground