4WABS Line Locks PROBABLY NOT A GOOD IDEA
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NON-STANDARD WIRING - DO NOT USE THIS DIAGRAM FOR DIAGNOSIS!!!

This modification simulates front cutting brakes, and can line-lock all the brakes while the key is in any position. Note that the Tn/Y circuit modification MUST use the larger terminals in C202, and wire size must be consistent with stock, AND the switch must be rated for 30A (very HD). The other switches & circuits are lighter, but the wire must still be at least as heavy as those stock circuits.

CAUTION: I haven't tested this circuit, and it's possible that the isolate solenoids will burn up under continuous duty. For the circuit to work as drawn, I assume that the module will UNground pin 19 when it loses power to pin 17. That may NOT be the case... I'm working on an improved design.

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Owner caption February 2012 · Photo 4209 of 5000