Trailer Life Directory Open Roads Forum: 2008 Jayco Seneca 35GS Trailer Wiring Problems


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lightman45

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Posted: 10/12/09 11:24am

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We recently took an extended trip out West with our Jayco Seneca 35GS, pulling a dingy. I checked the lights on dingy after hooking up to MH before leaving home and everything was working fine. About half way through our 6500 mile trip we discovered that we no longer had turn signals or brake lights on dingy when connected to MH. I checked lights with volt meter at connector plug on MH and was not getting power for turn signals and brake lights at that point. I had checked at truck repair shop, but they did not have wiring diagram and could not correct problem. We do not have anyone near us that will work on this problem. Has anyone had this problem? Does anyone know where I can find a wiring diagram that will show this trailer wiring for the 2008 c5500 Kodiak? Any suggestions will be appreciated.

2008 Jayco Seneca 35GS HD
2002 Harley Davidson Screamin Eagle Roadking

ronfisherman

SE Michigan

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Posted: 10/12/09 12:18pm

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Check out this Upfitter site. GM Upfitter Integration - Body Builder Manuals. Download the electrical manuals and others that are for your year MD truck.

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GrumpyandGrandma

CIncinnati, OH

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Posted: 10/12/09 02:17pm

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There is another plug just forward of the hitch under the unit. Did you check that? It should have been wrapped in tape but it may have seperated. Also check the ground wire going to the 7 wire connector.

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Retired JSO

Florida

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Posted: 10/12/09 02:48pm

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I also believe a Chevy (at least on HD pickups) has one fuse for the truck turn signals and another for the trailer independent of each other.

lightman45

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Posted: 10/12/09 04:50pm

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Thanks for the replies.

I checked the plug foward of the hitch and I am not getting voltage for turn signals and brake lights at this plug. The problem is in front of this plug.

Where are the fuses for the trailer lights located on unit?

ronfisherman

SE Michigan

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Posted: 10/13/09 02:49am

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Fuse for Trailer Lights is #13 on page B12 and B13 of electrical manual I linked above. This fuse block is under passenger side of dash. Some chassis have a upgraded option of circuit breakers like mine has. If you find yours is blown. Consider putting a circuit breaker in its place.
Relays that run trailer lights are also located in this area.

bumpus4

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Posted: 10/24/09 12:34am

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Why yes I had the very same problem except the head lites also would not turn on. We were getting ready to pull out for ALB from Tn. My selling dealer tech's first question was about hooking up trailer.

Said it happens all the time. Changed fuse and problem solved. Said to make sure the center ground post on the 7 (or is it 6) wire connector plug grounds first with your toad.

regards, bumpus4

bumpus4

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Posted: 10/26/09 02:08pm

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I have two electrical diagrams for my Seneca HD 35GS in my files. I am now working on my car hauler but tonight I will look for the diagrams. If you want to pm your email or fax # I am sure my wife can fax them to you. I just can't stop right now but will later. got to run to town for a tap/dye set cause mine has grown legs and walked off or is playing hide/@seek.I just know my sons would't take them without asking ---hee hee hee
bumpus4@attglobal.net

regards

10/26/09 forgot--- all my paper stuff is in the mh in the shop. Will pick up Friday.

* This post was edited 10/26/09 09:39pm by bumpus4 *

bgie

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Posted: 10/27/09 05:27am

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Do you have brake lights on the Seneca and does you cruise control work? If not, you could have a problem with your brake light switch. This has been a big problem on the Kodiak.

Good luck, Bill

Bill and Karen
Chloe, the Golden Retriever
2006 Jayco Seneca HG33SS

bumpus4

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Posted: 10/28/09 06:29pm

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I have to apologize as the diagrams I have do not include the towed trailer wiring. I made two blow ups on photograph paper to send but upon re-reading the prints I discovered they did not include the trailer wiring. Sorry for the mix up.
regards

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Open Roads Forum > Class C Motorhomes > Super C

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