Towing Equipment› Trailer Wiring and Electronics
Pollak Engineered
SOCKET LED CIRCUIT TESTER
SKU: P01M 12-777E
Beginner — under 30 min
Description
This heavy-duty tool plugs directly into a vehicle's 7-pole RV-style trailer socket to provide visual confirmation of electrical functions. It features bright, easy-to-read LEDs that indicate the status of six critical towing functions: Back-up/Reverse Lights, Right Turn/Brake Light, Taillights/Marker Lights, Left Turn/Brake Light, Brake Controller Output, and 12-Volt Auxiliary Power. Constructed from high-impact plastic, it includes two easy-pull tabs for simple removal.
Fitment
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Available on iOS & Android
Specifications
| Brand | Pollak Engineered |
| Part Number | P01M 12-777E |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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