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Old 12-31-2014, 04:37 PM   #1
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Unhappy No Battery Power to Coach

I have a 2015 Nitro XLT30 FQSL toyhauler. I winterized it in October, taking the batteries out and putting them on a trickle charger. They both show 12.8 volts. I hooked them back up as we are heading for Phoenix tomorrow and 2 issues came up: first - there were two red cables and one black cable to reattach and I dont remember which way they went, although one of the red cables has a circle of black tape on it. I called the dealer - no one in the service dept. but the person on the phone insisted that both red cables should go on the positive terminal. I hooked up both reds to the positive and the black to ground and no power goes into the coach. I can trace power to a wire heading into the coach but no power for lights, furnace etc. I checked the fuses as there are 2 40 amp fuses designed to blow if battery polarity is reversed and both have continuity. An extension cord will power up everything in the coach, but no battery power in and no dc from the converter out to the battery. has to be something simple but what?????
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Old 12-31-2014, 04:45 PM   #2
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Originally Posted by LairdT View Post
I have a 2015 Nitro XLT30 FQSL toyhauler. I winterized it in October, taking the batteries out and putting them on a trickle charger. They both show 12.8 volts. I hooked them back up as we are heading for Phoenix tomorrow and 2 issues came up: first - there were two red cables and one black cable to reattach and I dont remember which way they went, although one of the red cables has a circle of black tape on it. I called the dealer - no one in the service dept. but the person on the phone insisted that both red cables should go on the positive terminal. I hooked up both reds to the positive and the black to ground and no power goes into the coach. I can trace power to a wire heading into the coach but no power for lights, furnace etc. I checked the fuses as there are 2 40 amp fuses designed to blow if battery polarity is reversed and both have continuity. An extension cord will power up everything in the coach, but no battery power in and no dc from the converter out to the battery. has to be something simple but what?????
Sounds like you need to find the other Black Cable---It has to be there somewhere--it must have fallen out of sight. AND you must have the Coach Battery Switch turned off. Be afraid of Smoke- it's expensive.
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Old 12-31-2014, 04:55 PM   #3
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you said trickle charge.i would fully charge the the deep cycle battery with a full battery charger to see if it helps.make sure all connections at the battery are clean and tight.
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Old 12-31-2014, 05:04 PM   #4
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You should have taken your phone out and snap a photo(s) of the battery setup PRIOR to removing them for trickle charging.

Anyway, you have two batteries that should be hooked together in parallel.

Not sure how your toy hauler manufacture decided to do the cabling but the positive terminals need to be hooked together and the negative terminals need to be hooked together.

Reference this chart.

Dr4Film ----- Richard
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Old 12-31-2014, 06:13 PM   #5
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The second battery was an add-on I requested from the dealership. A single battery should have no trouble lighting interior lights, but it is significant that there is no voltage back to the battery from the coach when shore power is applied. I am thinking there must be a switch or a breAker to reset. I should have taken a picture of the cable arrangement before I detached it too��.
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Old 12-31-2014, 06:14 PM   #6
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PS tanks for the battery chart - very thoughtful!
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Old 12-31-2014, 06:35 PM   #7
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When hooked to shore power your converter is supplying 12 VDC to the set of batteries and the coach. Back trace from the batteries to the converter and see why that is not working. That could be a simple fix such as a fuse or pin circuit breaker to reset.

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Old 12-31-2014, 06:44 PM   #8
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Salesman/Storage switch??
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Old 01-08-2015, 10:45 AM   #9
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Fixed! No thanks to any dealer!

I learned yesterday that there were 30 amp relays (4 of them) mounted next to the batteries. I apparently created an arc when hooking the batteries back in, and fried one of them. $5.00 at an RV parts department ($10.00 as i now have a spare) plus the frustration of being told 2 weeks out to get an appointment at a service facility and I would need to leave the coach for 4-5 DAYS while they "worked on it". I hired a mobile serviceman for $55.00 - took 15 min to diagnose - I picked up the part.�� also got a healthy and repeated dose of "you are probably stupid and just didn't hook the ground wire to the battery" insinuation from more than one dealer here in Phoenix.
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Old 01-08-2015, 10:57 AM   #10
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Sounds like you need to find the other Black Cable---It has to be there somewhere--it must have fallen out of sight. AND you must have the Coach Battery Switch turned off. Be afraid of Smoke- it's expensive.
Deny
You are correct!
If he has the the house battery switch "turned OFF" no battery power can get from the batteries to the coach.
Mel
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Old 01-09-2015, 07:47 AM   #11
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I learned yesterday that there were 30 amp relays (4 of them) mounted next to the batteries. I apparently created an arc when hooking the batteries back in, and fried one of them. $5.00 at an RV parts department ($10.00 as i now have a spare) plus the frustration of being told 2 weeks out to get an appointment at a service facility and I would need to leave the coach for 4-5 DAYS while they "worked on it". I hired a mobile serviceman for $55.00 - took 15 min to diagnose - I picked up the part.�� also got a healthy and repeated dose of "you are probably stupid and just didn't hook the ground wire to the battery" insinuation from more than one dealer here in Phoenix.
FWIW I would not beat myself up over the fried relay. They fail for several reasons but hooking up power is not usually one of them.
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