M1009 Battery Disconnect Switch??

[jplace1011]

I’ve noticed my battery lugs are getting worn from connecting and disconnecting them from the batteries for my CUCV M1009. I already replaced them once.

Is it ok to use a Battery Disconnect Switch for when I’m working on my vehicle? This would be an effort to prevent wearing out my Battery Cable Lugs. If so, what type would be ideal: Blade, Knob?

Would a Battery Disconnect Switch go onto one Battery (Negative Terminal?) or onto Both Batteries?

Thank you in advance!

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[87cr250r]

Put it on the negative. It's the only common terminal.

 

[jplace1011]

I’ve noticed my battery lugs are getting worn from connecting and disconnecting them from the batteries for my CUCV M1009. I already replaced them once.

Is it ok to use a Battery Disconnect Switch for when I’m working on my vehicle? This would be an effort to prevent wearing out my Battery Cable Lugs. If so, what type would be ideal: Blade, Knob?

Would a Battery Disconnect Switch go onto one Battery (Negative Terminal?) or onto Both Batteries?

Thank you in advance!

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@cucvrus @Warthog @doghead Would you have any input?

Could I just attach one of these to the Ground on each of the two batteries? Disconnecting the Grounds as a way to prevent any damage?

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[87cr250r]

There is only one ground and that is the negative terminal on the front battery.

 

[jplace1011]

There is only one ground and that is the negative terminal on the front battery.

@87cr250r

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[cucvrus]

There is only one ground and that is the negative terminal on the front battery.

True statement. Front ground is only ground. That is the only ground terminal connected to the frame. True earth in British terms. I owned an MG and it had earth on the battery connection for ground.

 

[jplace1011]

True statement. Front ground is only ground. That is the only ground terminal connected to the frame. True earth in British terms. I owned an MG and it had earth on the battery connection for ground.

@cucvrus There you are! With that in mind, should I just put one of these clamps on the Ground Post for each battery? Disconnect them when working on the vehicle. Would that be safe?


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[cucvrus]

@cucvrus There you are! With that in mind, should I just put one of these clamps on the Ground Post for each battery? Disconnect them when working on the vehicle. Would that be safe?


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1 is all you need. Only one ground makes contact with the frame.

 

[jplace1011]

1 is all you need. Only one ground makes contact with the frame.

@cucvrus I’m terrified of frying anything, as mentioned above in the screen shot I shared! I’m thinking if I use a clamp on both batteries it would be over cautious, but still ok?


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[cucvrus]

Do as you wish. You ask. Someone answered with a true statement. Only 1 ground that is the front battery to frame ground. I myself would just disconnect the batteries and live with it. Do as you wish. Switched ground is a dead truck. No ground no start. I may be missing something here. Good night. I have work at 0400.

 

[87cr250r]

The scenario described above, it can only happen if someone wires 12v loads into the rear battery. If your truck is stock you're safe braking the front negative.

 

[jplace1011]

The scenario described above, it can only happen if someone wires 12v loads into the rear battery. If your truck is stock you're safe braking the front negative.

@87cr250r I’m going to take a few photos to show how and what is hooked up to my two batteries.

Let’s see if I have 12v Loads into the Rear Battery.


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[vanaisa]

Why photos?
Take off front battery negative wire. Put voltmeter between frame and rear battery positive. If voltmeter shows volts (12,xx), then you have some previous owners additional wiring.

 

[jplace1011]

Why photos?
Take off front battery negative wire. Put voltmeter between frame and rear battery positive. If voltmeter shows volts (12,xx), then you have some previous owners additional wiring.

@vanaisa I’m thinking of putting quick release disconnect battery terminals onto the Neg Post of each of the 2 batteries. It seems to be the sure and safest way. Or, I’ll just leave it as is and disconnect the batteries normally. If it the existing clamps wear out again, I’ll replace the cable and clamp again. I am over cautious because I don’t want to fry anything. That would really, really suck!!


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[jplace1011]

@vanaisa I’m thinking of putting quick release disconnect battery terminals onto the Neg Post of each of the 2 batteries. It seems to be the sure and safest way. Or, I’ll just leave it as is and disconnect the batteries normally. If it the existing clamps wear out again, I’ll replace the cable and clamp again. I am over cautious because I don’t want to fry anything. That would really, really suck!!


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@Warthog @doghead would you masters of the CUCVs have any input?


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[adf5565]

@vanaisa I’m thinking of putting quick release disconnect battery terminals onto the Neg Post of each of the 2 batteries. It seems to be the sure and safest way. Or, I’ll just leave it as is and disconnect the batteries normally. If it the existing clamps wear out again, I’ll replace the cable and clamp again. I am over cautious because I don’t want to fry anything. That would really, really suck!!


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I used those on my camper for attaching a solar powered charger. Honestly they're pretty chintzy so I wouldn't recommend them for a cucv.

Something like this would be more robust which I have on another vehicle I own if you really want quick disconnect ability.

 

[jplace1011]

I used those on my camper for attaching a solar powered charger. Honestly they're pretty chintzy so I wouldn't recommend them for a cucv.

Something like this would be more robust which I have on another vehicle I own if you really want quick disconnect ability.
View attachment 899624

@adf5565 Thank you for the info., that’s too bad yet still good to know! It seems the Blade Type of Switch may be the best option.


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[Mad Texan]

Blade switches are exposed, where a battery shut off switch isn't. With rubber boots on the terminals and mounted there is very little chance of shorting. YMMV

 

[jplace1011]

Blade switches are exposed, where a battery shut off switch isn't. With rubber boots on the terminals and mounted there is very little chance of shorting. YMMV

View attachment 899690
View attachment 899691

@Mad Texan Thank you for the info sir. Where do you have that hooked up exactly? It’s a bit difficult to tell in the pictures.


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[Mad Texan]

@Mad Texan Thank you for the info sir. Where do you have that hooked up exactly? It’s a bit difficult to tell in the pictures.

It's a stock photo off the web not my truck. Additionally, with the key removed on the one it would double for theft security.