Turn signals blink quickly with trailer attached

[nom3rcy]

Originally Posted by JCL

Good memory. This was the one I recommended trying in a previous thread (after making sure that it isn't a simple ground problem)

U-Haul moving supplies: LED Light Trailer Module

That looks like the right solution if you need a 4-pin adapter as well.

[TowX]

Unfortunately that only works for trailers that either have no brakes or have surge brakes. Electric brakes require a 6- or 7-pin plug.

Here's the Valley part for the 7-round to 7-round adapter:
7-Way to 7-Way Trailer Adapter for VW, Audi and Porsche Towing Trailers with LED Lights Valley Wiring V39010

[JCL]

Originally Posted by TowX

Unfortunately that only works for trailers that either have no brakes or have surge brakes. Electric brakes require a 6- or 7-pin plug.

Here's the Valley part for the 7-round to 7-round adapter:
7-Way to 7-Way Trailer Adapter for VW, Audi and Porsche Towing Trailers with LED Lights Valley Wiring V39010

Good solution, and a good price.

It also suggests that the BMW tow wiring module uses the same Bosch electronics as VW/Porsche/Audi use.

[mgbmwx5]

This looks like a cheap solution:

7-Way to 5-Way and 4-Way Trailer Adapter for VW, Audi and Porsche Towing Trailers with LED Lights Valley Wiring V39008








7-Way to 5-Way and 4-Way Trailer Adapter for VW, Audi and Porsche Towing Trailers with LED Lights



Code: V39008
Price:$14.95
Shipping Weight: 1 pounds
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Valley Wiring - V39008

Designed for use with 2007+ Volkswagen Tourareg, Audi Q7 and Porche Cayenne when towing a trailer equipped with LED lights.
Valley 7 way RV style adapter to 4 and 5 pole flat trailer connectors

• Designed for use with 2007+ Volkswagen Touareg, Audi Q7 and Porsche Cayenne (or any vehicle with a factory specific 7-way plug) when towing a trailer equipped with LED lights
• Plugs into a 7-way connector on the vehicle and 4 way or 5 way flat connector on the trailer

[JCL]

Originally Posted by mgbmwx5

This looks like a cheap solution:

That is the same one suggested above, right down to the same part number.

[zzzzkev]

Did anybody have these errors associated with the trailer hitch electronics module?

>CHECK BRAKE LIGHTS<
>CHECK REAR LIGHTS<

I pulled the electronic module out 2 weeks ago, my Indy cleared the codes and the next time the auto-lights came on at dusk - BING! Same problem, so it's not the trailer hitch electronics module (the one that controls the trailer's lights) it's associated with the headlights. During the day it doesn't error out.