How To Wire The Reed Switch Of The Demco Air Force One With Coachlink Monitor

Updated 04/26/2023 | Published 04/24/2023

Question:

Purchased a Demco AF1 for Freightliner Chassis w Brake Sync and Wireless Coachlink. The Wireless Coachlink Installation Instructions TB20052 Rev1 1/19 Step 2A wiring diagram shows a reed switch with three wires and the text provided instructions for connecting the three reed switch wires. The reed switch provided in the AF1 kit has a reed switch with 2 wires. Please advise how to obtain the correct three wire reed switch or how to install with the 2 wire reed switch provided.

asked by: George

Helpful Expert Reply:

I've attached a little diagram below from the instructions of the Demco Air Force One Supplemental Braking System w/ Wireless Coachlink # DM26VR that shows how to wire your reed switch.

In the 2-wire reed switch setup you will just run the black wire of the switch to the red wire of the transmitter and the violet wire to the breakaway fuse.

The 3-wire reed switch just has an extra wire that you would run to ground or to the negative battery post if the battery is disconnected.

expert reply by: Kevin C