Toad Light Mystery

OP jswat says he is using a 4 wire connector.

jswat,
Ok, just wondering a few things here. If I interpret your description correctly, when you connect your toad, to the BACK OF ANOTHER CARs 7-pin connector, and then send signals from that secondary car, your toads tail lights have ALL FUNCTIONS, correct?

But, when you hook your toad up to your coach, you have running lights but, no brake and turn, for each side, correct?

May I ask, if you put a test light to each and every terminal (pin) in your 7-pin trailer plug, do you get all the correct signals coming from each of those pins? That is:

1. Tail/marker
2. Rt turn/brake
3. Lf turn/brake
4. Ground

Now, if your 7-pin trailer connector is functioning correctly on all the pins, and, your toads tail lights are functioning correctly when hooked to another tow car, I'm suspecting your problem is in the 7-pin plug itself. I had that same EXACT PROBLEM with a friends toad one day when I got done wiring his Jeep for towing. Since he didn't have his motor home at our house for us to hook up to, to test all his newly wired lights, I just backed my truck up to the front of his Jeep. I borrowed my pig tail from my coach and plugged my truck into his Jeep.

NO BRAKE AND TURN SIGNALS!!!!!!!!!! But, I had running lights. What it turned out to be, after a hour of research, was the fact that the female tangs inside one of the plugs, had separated just enough that, there was no contact with the male counterparts from the pig tail for both sides. Talk about a strange event. But, we got it figured out and all was well.

Also, may I ask, are you utilizing the stock tail light bulbs in the toad, for toad lights when hooked up to the coach? Or have you installed alternate bulbs in the tail light housings?
Scott

Tommy G, low voltage sounds likely. I know the grounds are all good and the lights work when connected to my other car. It's just when I'm connected to the MH that my signal lights and brake lights do not work. Tomorrow I'll check voltage.

Check the actual voltage from the coach with a digital meter. If there has been a slight voltage drop, the diodes will not pass too low of a voltage. My old coach only gets me 11.75 at the connector and diodes will not pass it. I couldn't find the drop(disappearing wiring) and gave up. I use the magnetic lights now.

Is the ground from the MH system tied to the Vibes ground under the hood?
I would check this connection. White wire in harness. It could be pulled loose in connector.
Flat or road connector?

Sorry, I do have diodes in the rear of the toad. The toad is a Pontiac Vibe, 2009.

What prevents back-feed into the toad?
Where is the ground connected in the toad? Are you connecting it to the toads ground?
Make and model of toad?

Bud, I am using a 4-wire. The toad signals are red. No diodes and the connector is a 4.

I am guessing that you are using a four wire, is this correct?
Are the lights on the problem child toad using red turn signals or separate?
Do you have diodes in rear of toad?
Post what style of connectors. 4,6 or 7?
Color of lights on MH and toad?

Thanks for the replies. I have checked the ground and everything's good. I have signal at every point down the cable and when I connect to the other car I am using the same cable and all lights work. When i connect to the MH I have tail lights but no signal lights or brake lights. When I disconnect the cable from the toad and check the connector at the end of the cable I have signal. I am mystified.