Operation CHARM: Car repair manuals for everyone.
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 A: All Power Windows Are Inoperative - Expedition

PINPOINT TEST A: ALL POWER WINDOWS ARE INOPERATIVE-EXPEDITION


A1-A2:






A2-A3:






Normal Operation
Power is sent to the master window control switch through circuit CBP47 (GN/BU) from the accessory delay relay. The master window control switch is grounded through circuit GD143 (BK/VT).

Possible Causes
- Circuit breaker
- Open in circuit CBP47 (GN/BU) or GD143 (BK/VT)
- Window control switch

CAUTION: Be careful when probing the SJB, battery junction box or any connectors. Damage will result to the connector receptacle if the probe being used is too large.