Operation CHARM: Car repair manuals for everyone.
Home >> Ford >> 2003 >> Explorer AWD V6-4.0L VIN E >> Repair and Diagnosis >> Heating and Air Conditioning >> Testing and Inspection >> Pinpoint Tests >> Test Z
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Test Z

PINPOINT TEST Z: THE PANEL/FLOOR AND COOL/WARM CONTROLS ARE INOPERATIVE USING THE REAR AUXILIARY CLIMATE CONTROLS


Test Z1-Z2:






Test Z3:






Normal Operation
Under normal operation, the rear auxiliary climate control assembly receives voltage from the front auxiliary climate control assembly, when the REAR blower position is selected, through circuit 276 (BN) and ground from 1203 (BK/LB).

Possible Causes
- An open in circuit 276 (BN) or 1203 (BK/LB).
- Front Auxiliary Climate Control Assembly.
- Rear Auxiliary Climate Control Assembly.
pro multis · About Operation CHARM