Good Sam Club Open Roads Forum: Batteries won't hold charge - need help
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 > Batteries won't hold charge - need help

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sgordon_lazydaze

Santa Monica

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Posted: 09/06/21 12:59pm Link  |  Quote  |  Print  |  Notify Moderator

Hi All,

Newbie here so please excuse any ignorance. I have a 1992 class c Lazy Daze with a Chevrolet G30 cab.

I purchase her in March and drove every week/weekend with no problems for about 3-4 months. Went to go move her one day and both car battery and house battery were completely dead. Discovered I had left a small fan on for two days (oops) so it made sense. I replaced both batteries and made sure nothing else had been left on. Drove around for a couple days, then- bam - wouldn't start again. Both batteries dead- this time nothing was left on and nothing was draining power. Had a mechanic come out and alternator was reading as dead so I had the alternator replaced and once again replaced both batteries- started up no problem. Next day I drove her for about 3 hours, still no problems. Day after that, both batteries dead again. After doing some research I discovered the purpose of the isolator. So, my question to you all is- do we think if I replace the isolator (seems easy enough to replace myself) that this will solve the problem? Or do we think it's necessary to have it towed to an RV mechanic? I'm in a bit of a tight spot as I'm in the process of moving into her full time and leaving a failing relationship so will take any help I can get to have this fixed asap.

I've gone ahead and ordered a new isolator (same as the current one installed - diode) that will arrive tomorrow. I will try and replace my car battery though Autozone warranty for the 4th?? time but not sure if they will give me another within the warranty.

Please help!

Lwiddis

Monterey, California

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Posted: 09/06/21 01:59pm Link  |  Quote  |  Print  |  Notify Moderator

Read the warranty closely and take them back if there are no specific exclusions. Not what they say…it’s what they wrote.


Winnebago 2101DS TT & 2020 Chevy Silverado 1500 LTZ Z71, 300 watt solar-Lossigy 200 AMP Lithium battery. TALL flag pole. Prefer boondocking, USFS, COE, BLM, NPS, TVA, state camps. Bicyclist 14 yr. Army -11B40 then 11A - (MOS 1542 & 1560) IOBC & IOAC grad


Gary45

Oshawa, Ontario, Canada

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Posted: 09/06/21 02:18pm Link  |  Quote  |  Print  |  Notify Moderator

It's easy to replace the isolator, if the both batteries are dead that quick something is drawing power all the time. Check and make sure nothing is on. Do you have a volt meter? If you do you can measure how many amps are being drawn from each battery, leave wires disconnected and isolated at the isolator so you can check each battery separately. You have something on, likely on the house side.

sgordon_lazydaze

Santa Monica

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Posted: 09/06/21 02:28pm Link  |  Quote  |  Print  |  Notify Moderator

Thanks so much for the reply, Gary. Any idea what could be on? Something that may not be obvious like a fan or light- I'm not sure what to look for. Yes, I have access to a multimeter to check voltage. Voltage on car battery is reading under 12v. Since I cant start the engine due to dead battery, I'm not able to read voltage coming from current isolator. I imagine I need to replace the battery in order to move forward with trouble shooting?

Thanks again!

bgum

South Louisiana

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Posted: 09/06/21 02:40pm Link  |  Quote  |  Print  |  Notify Moderator

Tank heaters or short somewhere or light in one of your storage compartments.

Diamond c

West ky

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Posted: 09/06/21 02:41pm Link  |  Quote  |  Print  |  Notify Moderator

I hate electrical problems! I’d start looking at water pumps and the like, or maybe a bad ground. After that I’d have to find a better mechanic. For sure there’s something drawing power that shouldn’t be.

capacitor

California

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Posted: 09/06/21 02:55pm Link  |  Quote  |  Print  |  Notify Moderator

CO detector? Do you have a battery isolator for the coach batteries?

sgordon_lazydaze

Santa Monica

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Posted: 09/06/21 03:09pm Link  |  Quote  |  Print  |  Notify Moderator

Water pump, water heater both have been switched off. I installed an inverter to the house battery but it's off when I'm not using it. Rear camera wired directly to the house so could be actively pulling power? But then again I had installed for months with no battery issues. Will obsessively search again for any compartment lights. Wouldn't a fuse appear blown in house if there was a short? Ive checked the house fuse box and all fuses are good. How about fuses related to car battery? Any idea where those would be located?

By bad ground do you mean the actual connection to the ground on the battery? Sorry I have very basic electrical knowledge and very little knowledge of cars. This is proving to be a good excuse to educate myself more on both.

The isolator seems to be connected to both batteries but unsure exactly how it's wired.

I'll check for a built in CO detector, I installed a smoke/co detector in the ceiling but it runs on batteries/not wired to house.

Any other tips are highly appreciated! So glad I found this community.

Thanks!!

bobndot

USA

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Posted: 09/06/21 03:19pm Link  |  Quote  |  Print  |  Notify Moderator

While looking at the amp draw on your meter, start pulling the coach rv fuses one at a time until the meter shows which circuit the problem is on. At least that will narrow things down .

On the truck side : Having a 50mA draw on the chassis battery is normal. That low draw will take a long time to deplete a good battery.

While checking amp draw make sure you put tape over the door switch to keep the interior light off.

SJ-Chris

San Jose, Ca

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Posted: 09/06/21 03:20pm Link  |  Quote  |  Print  |  Notify Moderator

If you need a quick solution (which your post states), you can consider adding one of these to each battery and disconnecting them each time when you leave them. Simple to install. That will guarantee nothing is being drawn from the batteries while you are away. That will give you time to fix the problem later once you get settled in.

https://www.amazon.com/gp/product/B07SBFKM5Y/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Good luck!
Chris


San Jose, CA
Own two 2015 Thor Majestic 28a Class C RVs

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