2008 Tiffin Allegro Open Road - No Brake Lights on 7-Pin Tow

[swhit3215]

I have a 2008 Allegro Open Road on the Ford F53 Chassis.

I have a 7-Pin wiring harness for towing. The plug has working Left & Right Turn signal, 4-Way Flashers, Running Lights. But No Brake Lights.

I have not been able to locate a seperate fuse for the brake lights in any of the manuals. Based upon other posts, I have looked for a seperate fuse panel in the basement bays.

Looking for any suggestions?

Thank you!

[HarryStone]

I had the same thing on my rig. Found a fuse in a fuse box in the drivers area with the fuses for the trailer wiring.

[l1v3fr33ord1]

swhit3215-

First off, welcome to iRV2!

Second, you should add a "signature" to your profile. It contains whatever info you want; most people put info about their coach there, so they don't have to type it into each message. Instructions for adding a signature are here.

Re: No brake lights at the coach's trailer hitch connector. Three questions:

1) Are you testing by looking for signals at the coach's trailer hitch connector? (see "Vehicle Side 7-Way/7-Way RV Standard" here for the correct signal and pin locations.)
2) Do the brake lights on the coach use the same bulbs for brake and turn signals, or are they separate bulbs?
3) Are the brake lights on the coach working correctly?

There is a fuse for the brake lights: Number 9 in the Passenger Compartment Fuse Panel (link here). Unhappily, if this fuse goes out it eliminates the brake signal for all purposes- not just the trailer hitch connector. Hence my questions above.

[swhit3215]

1) Are you testing by looking for signals at the coach's trailer hitch connector?

Yes, I am looking at the hitch connector.

2) Do the brake lights on the coach use the same bulbs for brake and turn signals, or are they separate bulbs?

They are seperate. Turn Signals are Yellow, Brake lights are Red.

3) Are the brake lights on the coach working correctly?

Yes, the brake lights work on the coach.

[l1v3fr33ord1]

swhit3215-

From your answers, there are two possible causes:

1) Wiring from the brake switch to the turn signal switch has failed, or
2) The turn signal switch has failed

This assumes:

1) That Tiffin has used the signals Ford provided, and
2) That no one has modified the Ford wiring

[BobnMelba]

I had a similar problem that I spent hours trying to figure it out. It turned out that the pin in the connector was not making contact, I ended up simply spreading the pin in the connector. If yours are like mine there is a split in the pin that I used a thin blade to spread the connector pin apart slightly and it made contact and has worked fine ever since.