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Main Forum => General Discussion => Topic started by: serrano4657 on September 05, 2019, 10:13:38 am

Title: Starter battery disconnect switch
Post by: serrano4657 on September 05, 2019, 10:13:38 am
Has anyone installed a battery disconnect switch on there starting battery?    My Phoenix is kept in storage and I thought of adding a battery disconnect switch to starter battery so it won't drain the battery. Will this affect the computer in the engine or erase any engine codes?
Title: Re: Starter battery disconnect switch
Post by: Joseph on September 05, 2019, 11:00:36 am
I installed one on mine. It has no ill effects as far as codes or things like a 5 star tune. I installed a Ampper top post knife blade master switch. Cost was roughly $16.00 on Amazon. Itís worked fine all year with no issues.
Title: Re: Starter battery disconnect switch
Post by: 2 Lucky on September 05, 2019, 01:35:22 pm
I use these...$6.99 Harbor Freight and elsewhere.
Title: Re: Starter battery disconnect switch
Post by: serrano4657 on September 05, 2019, 03:07:54 pm
Thanks for the help. I am going to get one now
Title: Re: Starter battery disconnect switch
Post by: Ron Dittmer on September 05, 2019, 07:58:46 pm
Disconnecting the battery disconnects everything including erasing the ECM.  It's not a bad thing to do.  I do it all the time during extended storage.

I had considered getting one of those rotational kill-all switches, but I am concerned about "reliability" over time, especially when the slightest of corrosion sets in.  There is a whole lot of amperage when cranking over the Ford V10 engine.  That would be the worst-case condition to worry about a degraded connection.
Title: Re: Starter battery disconnect switch
Post by: BlueBlaze on September 13, 2019, 08:04:13 am
The FIRST time I replaced my chassis battery, Murphy intervened and chose that moment to strike whichever computer it is that decides when to turn off the under-chassis courtesy light after a few minutes.  So, the next time I tried to start the PC, I discovered that my brand new $100 battery was deader than a door-nail.  I swore to the Costco guy I hadn't left the lights on.  He was skeptical but replaced it anyway.  So I felt like a real jerk when I thought about it, and then discovered the stuck courtesy light.  In addition to unscrewing the bulb, I also added a battery cutoff to prevent anything like that from ever happening again.

As to the reliability of the battery cutoff switch, who cares?  At $10, you can replace it every year if it bothers you. 
Title: Re: Starter battery disconnect switch
Post by: Doneworking on September 13, 2019, 08:55:49 am
I have used 2 Lucky's illustrated switch in all our rigs since the 1990s.  They never caused me any problems and I never had any corrosion problems with them.   They are simple and I love simple.
I bought a new one for the PC and left the old one on my previous rig when we sold it.   Bought it at Walmart for about the price mentioned. 

Paul