Replacement Wiring Harness for Demco Kar Kaddy SS Tow Dolly

Updated 11/12/2026 | Published 11/10/2026

Products Featured in This Question

20 Ft 4-Way Trailer Wiring Harness - Wishbone Style - 30" Ground

(346)

$19.61

Replacement Tail Light Wiring Harness for Demco Kar Kaddy X Tow Dolly - Qty 1

$58.10

Deka Heat Shrink Butt Connector - 12-10 Gauge - Nylon Insulation - Yellow - Qty 5

(1188)

$8.14

Question:

kar kaddy ss drum brakes wiring harness

asked by: Larry S

Expert Reply:

Hi Larry,

Demco doesn't make a dedicated wiring harness for the Kar Kaddy, instead you'll need to use a generic wiring harness like the Optronics 20' 4-Way Trailer Wiring Harness - Wishbone Style part # A20WB. It's the same wishbone style as what comes with the Kar Kaddy so you can remove the old harness and splice this in its place. It's 20' long so you may need to cut it down to fit, you can use heat shrink butt connectors like the Deka Heat Shrink Butt Connectors part # DW05745-5 to protect from any corrosion. On the off chance that you meant a wiring harness for the Kar Kaddy taillights; we do have the Replacement Taillight Wiring Harness for Demco Kar Kaddy part # DM52MV if you need it.

How long have you had your Demco Kar Kaddy SS for?

expert reply by: Claire H

Gene C.

11/12/2026

Great product, best move to update the lighting on your trailer. Easy to install, I use snap connectors and dielectric grease on all the connections to prevent oxidation. You will wish you replaced your wiring earlier! GC

Claire H.

11/12/2026

@GeneC Definitely a good idea to use dielectric grease with snap connectors! It's not usually required with butt connectors, but since snap connectors are more vulnerable to moisture and dirt, it's a must

Spanky

11/12/2026

The 20 Ft. 4-way Trailer Wiring was just what I needed to replace all the aging/unreliable wiring on my old trailer. The lights all work perfectly now. I had issues with the old wiring, but this installed easily and now tail lights, brake lights, and turn indicators all work perfectly! One less reason to get pulled over. :)