Everything worked fine - 2008 Lance 845 - 2003 GMC gasser ... as I plugged in the in-bed connector, got a spark between cord and connector. Then no power to the camper from the connector. NO lights, no charger line ... etc
Checked all breakers and fuses - all fine, nothing burnt. Can't get the plug to carry power. BUT, have a 7-pin extension that I use that fits into the rear trailer plug and reaches the camper tail-cord, so, plugged it in. Camper works fine from that plug-in
Is there an in-line fuse or breaker somewhere in the power line from the power source under the hood between power lug and camper power box that I can't see? It acts like, and should have, tripped a breaker or a fuse, but can't find any in-line from lug to power distribution panel under the sink cabinet.
Wonder if a relay or main fuse in the truck fuse box under the hood exists that could have blown.
Also, camper battery will not charge from the rear trailer plug? All lights etc work fine. And everything works with shore power, including battery charging.
SO, two issues -
1. Why won't the trailer 7-pin charge the camper battery?
2. Where might I find a 'hidden' in-line fuse or breaker in the power leg from cab to in-bed connector?
Under the hood ton the driver's side fender well should be thirty amp(normally) fuse feeding the stud for trailer charge wire. You need to look at the cover to see if yours is stud 1 or 2.
Some people have added a charge isolator relay ion circuit. Is your factory? then it doesn't have one.
Wonder if a relay or main fuse in the truck fuse box under the hood exists that could have blown. (Usually there IS a separate fuse/relay for 'towing' connection)
SO, two issues -
1. Why won't the trailer 7-pin charge the camper battery? (Although it plugs in to 7 pin, is it truly a 7 pin connector? Center pin is used for battery power source......does connector have a center pin? If so, is it 'hot'?)
2. Where might I find a 'hidden' in-line fuse or breaker in the power leg from cab to in-bed connector? (You will need to check/trace wiring from the in-bed and the OEM connectors. Usually when another connector is installed it is tied into existing towing wiring....so if OEM works then problem with in-bed connector is probably with the connector or wiring. BUT if in-bed is not tied into OEM tow wiring then need to trace it back to where it is connected to truck battery system)
2007 RAM 3500 QC LB SRW 5.9L CTD 48re 4:10 4K in bed 'quiet genny'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
Hit the Road Free & Clear April '07
Wonder if a relay or main fuse in the truck fuse box under the hood exists that could have blown. (Usually there IS a separate fuse/relay for 'towing' connection)
SO, two issues -
1. Why won't the trailer 7-pin charge the camper battery? (Although it plugs in to 7 pin, is it truly a 7 pin connector? Center pin is used for battery power source......does connector have a center pin? If so, is it 'hot'?)
2. Where might I find a 'hidden' in-line fuse or breaker in the power leg from cab to in-bed connector? (You will need to check/trace wiring from the in-bed and the OEM connectors. Usually when another connector is installed it is tied into existing towing wiring....so if OEM works then problem with in-bed connector is probably with the connector or wiring. BUT if in-bed is not tied into OEM tow wiring then need to trace it back to where it is connected to truck battery system)
The bed plug is tied into the trailer OEM wiring, BUT, when I had Lance install the Lance bed-plug in my truck at the factory, they put an 8gg wire from the hot system direct to the charge system in the RV battery (per normal Lance install). I can't see anything in that line, but not all is viewable - but then, why would they hide it? SO, probably not hidden.
I'll ask Lance Monday, but am on the road now, looking for an answer here. It seems to me that a spark-short (a brief second of course) should kick a breaker or burn a fuse, and never burn a line. That's why fuses exist, but all mine are good, and the system worked fine one minute, a spark when I was re-connecting the Lance, and the next second, nothing. But it has to be from bed-connector to the main truck feed, because the camper works with the trailer plug 'temporily' connected to the camper feed line... very odd, and I'm not much of a 'electrical guy', but tracing a wire only takes eyes. Am just thinking there is one somewhere else that I'm not finding because sometimes it just sits in an odd spot on a line.
enblethen wrote: Under the hood ton the driver's side fender well should be thirty amp(normally) fuse feeding the stud for trailer charge wire. You need to look at the cover to see if yours is stud 1 or 2.
Some people have added a charge isolator relay ion circuit. Is your factory? then it doesn't have one.
Mine is factory trailer hitch wires, but AM bed-plug installed at Lance factory. But, will check trailer to see if hot lead in center of plug when it stops raining - of course ... also, will check fuse stud too, again, but am sure it is 30a installed in underhood panel. What will tell me stud 1 or stud 2?
Battery isolator is factory installed in camper, not on truck.
enblethen wrote: The center pin is for auxilary items such as back up lights.
The 12 volt power is located at 11 oclock on the trailer side. Connector wiring
So, if I'm reading this diagram correctly, the red wire should be a hot charging wire from the alternator thru a fuse (under my hood, in the fuse case) to the auxilliary battery, in this case, charging the RV battery in my camper.
No, it should be a black. However the wiring from GM may not be colored as shown in the seven pin blade connector.
Some GMs have id tags adjacent to the connector on the wiring.
Okay -- tomorrow am going to see which ones are hot when the key is off. Then will check each line (turn, brake, etc) and see what's hot when it should be hot. Then, if a wire's left over, will see if it's hot lead, and it should go from hot lug under hood to the charging wire ... so if both ends are hot, then it should charge the camper battery when the engine is running.
If I don't figure this out tomorrow, will take it over to the shop here and have someone that knows this stuff better than me check it.
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