1) Turn the ignition to OFF.
2) Disconnect the body integrated unit connector.
3) Using the tester, measure the resistance between terminals.
Connector & terminal
(i84) No. 1 — (i10) No. 27 (combination meter): (i84) No. 9 — (i10) No. 26 (combination meter): (i84) No. 1 — (i88) No. 20 (A/C): (i84) No. 9 — (i88) No. 19 (A/C): (i84) No. 1 — (i50) No. 18 (navigation): (i84) No. 9 — (i50) No. 6 (navigation): (i84) No. 1 — (i85) No. 12 (audio): (i84) No. 9 — (i85) No. 11 (audio): (i84) No. 1 — (B419) No. 5 (gateway CM): (i84) No. 9 — (B419) No. 4 (gateway CM):
Is the resistance less than 10 Ω?
Repair or replace the harness.