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

Global Positioning System Module: Service and Repair



Up to 11/96

NOTE: As of approx. 12/96 the GPS control module (N14/2) is integrated into the navigation module / processor.






Quiescent current retention unit
disconnect, connect.

Ground lead on battery
disconnect, connect.

Holder (1)
remove, install.

Electrical connections on control module (N41/2)
disconnect, connect.

Control module (N41/2)
remove from holder (1), install.


Commercially available tester
Quiescent current retention unit e.g. Hans Zeheter CMP 12.2