4-38. W4 HARNESS (CONT)
Using semitrailer electrical schematic (figure FO-1) as a guide, reconnect socket connectors for W4 harness (3) to
Using semitrailer electrical schematic (figure FO-1) as a guide, reconnect W4 harness (5) to platform junction box
terminal boards TB1 (3) and TB2 (4).
Tiedown straps should be placed in a logical position to secure wiring harness.
Reinstall new tiedown straps as required.
Secure harness in place by installing harness back into loop clamps (para. 4-31).
Install two covers (2) on junction boxes TB1 (3) and TB2 (4) and secure with four captive screws (1).
Couple semitrailer and towing vehicle (para. 2-24) and check lights for proper operation.
4-39. APU WIRING HARNESS
This task covers:
General mechanics tool kit, item 16, appx. B
Electrical repair kit, item 18, appx. B
Tiedown straps (as required), item 27, appx. E