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)

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Pinpoint Tests

PINPOINT TEST A: NO COMMUNICATION WITH THE SMART JUNCTION BOX (SJB)


A1:






A2:






Normal Operation
The SJB receives voltage on circuits 1231 (RD/WH), 906 (RD/OG) and 905 (GY/LB) and is grounded through circuits 1203 (BK/LB) and 1205 (BK).

Possible Causes
- fuse(s)
- circuit 905 (GY/LB) open
- circuit 906 (RD/OG) open
- circuit 1203 (BK/LB) open
- circuit 1205 (BK) open
- circuit 1231 (RD/WH) open
- SJB