The new transmission control module is not letting the truck start because it thinks it is in gear, I need a TCM Wiring Diagram.
Mar 2, 2026 at 7:18 AM
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Verify all information, follow manufacturer service procedures, use proper tools and safety equipment,
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STRAILER
CAR REPAIR CONTRIBUTOR
54,189 POSTS
Usually this will be a transmission shift selector that is going out FYI. Here are the wiring diagrams for the TCM as requested, pleas let me know what you find, Check out the images (below). Ken
Images (Click to enlarge)
Mar 3, 2026 at 9:46 AM
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PCONSTANTINE
MEMBER
4 POSTS
I need a wiring diagram for the vehicle interface module for the truck listed.
Mar 6, 2026 at 9:09 AM
(Merged)
STEVE W.
CAR REPAIR CONTRIBUTOR
15,148 POSTS
The VIM on that truck is really just a relay box. Most of the wiring just passes through. Attached are the wiring and the connector views for it. The relays are soldered to the board but you can replace them with external relays for the neutral start and back-up lights if the module has failed.
Images (Click to enlarge)
Mar 6, 2026 at 9:09 AM
(Merged)
PCONSTANTINE
MEMBER
4 POSTS
I need a transmission control module pin-out.
Mar 6, 2026 at 9:09 AM
(Merged)
STRAILER
CAR REPAIR CONTRIBUTOR
54,189 POSTS
Is there something we are missing here? This is all the information we have. Ken
Mar 6, 2026 at 9:11 AM
PCONSTANTINE
MEMBER
4 POSTS
Do you have a pin out diagram for the connector that goes into the side of the transmission?