Aftermarket volt gauge. Batt / Acc male spade fuse box spot

[Bluemonster71RT]

In my 71 Challenger, there are 2 spots on the bottom of the interior fuse box that have a male spade connector. One says batt and the other is Acc.  I'm trying to install my Autometer volt gauge and was wondering if I can connect to the batt gauge? Is it switched? Or the Acc one? Thank you.

[roadman5312]

Acc is switched , batt hot all the time.

[Bluemonster71RT]

Good deal!!! Thank you.

[roadman5312]

And it's good to remember that most acc feeds go dead when your cranking the motor. When the key is in run or acc they are hot.

[Bluemonster71RT]

That makes sense. Any idea what the BATT one would have been used for? Diagnosis for techs back it the day?
 

[roadman5312]

That makes sense. Any idea what the BATT one would have been used for? Diagnosis for techs back it the day?

                 Not really sure, I know all fuse boxs from all the auto makers had them. Possible diagnosis while working under dash. Also could have been used for options that could be added by the dealer. It's where I plugged in for the power to my Mini 8 Track back in the day so me and my main squeeze could listen to tunes with the key off   

[blown motor]

If you use the Batt terminal MAKE SURE you use an inline fuse. The PO of my car didn't and I nearly burned my car up.

[Bluemonster71RT]

If you use the Batt terminal MAKE SURE you use an inline fuse. The PO of my car didn't and I nearly burned my car up.

The ACC one is fine without a fuse?

[roadman5312]

The ACC one is fine without a fuse?

               I believe it's fused. Test with test light, pull fuses one at a time, see if light goes off. I believe the batt terminal is only protected by the fuseable link on the battery cable, takes quite a short to blow it.

[dodj]

Instead of that spade connector on the fuse box I would recommend using the molded accessory connectors behind the gauges. They are part of the dash harness and are made for accessory add ons.
Don't remember off hand if it is the red or yellow that is switched. Yellow i think. You will end up with a cleaner install. 

[Bluemonster71RT]

Instead of that spade connector on the fuse box I would recommend using the molded accessory connectors behind the gauges. They are part of the dash harness and are made for accessory add ons.
Don't remember off hand if it is the red or yellow that is switched. Yellow i think. You will end up with a cleaner install.

This is what I did so that would of been a less than optimal route. Thank you though.