Fuse panel

[strategic90]

I have 1989 suburban V1500, 350 gas engine. There's an auxiliary battery set up on the is truck that has a wire (black w/white stripe) going to the "S" side of the solenoid from the area of the fuse panel that is marked as "ACC", has three ports there, one of which is the black wire with white stripe.

My question is this, should ACC buss be powered with key on? There is no power there now, if there is supposed to be power with key on, where does power come from to power up the ACC buss? The power supply location, if on the engine compartment side, would be appreciated.

Previous owner may have put this auxiliary battery in or paid someone to install because the solenoid is not a continuous duty solenoid.

I powered up the "S" terminal to get the solenoid to trip, nothing, I'm assuming that solenoid is not good...

Thanks in advance for help.

 

[75gmck25]

It was probably wired differently on a the '89, but my '75 Camper Special has the factory 2nd battery option and it uses a relay mounted on the driver's side inside the fender. Its a relatively small relay, since it only has to handle the charge output from the alternator.
- From the power junction next to the brake booster there was a 10 gauge wire with a fusible link that ran over to the relay on the fender, and then it had another power wire from the relay over to the battery positive. Battery negative was grounded to the body/frame.
- From the fuse box there was a power-on (18 gauge?) wire to activate the relay

Ignition On - relay activated, so the power junction was connected to the battery, and the alternator charged the battery.
Ignition off - relay disconnected the battery from the power junction and isolated the battery. This allowed you to power the camper while parked, but only draw from the aux battery.

 

[strategic90]

I appreciate the in site and advice, as soon as weather gets better and I get a free weekend, I'll be diving back into this.
I did find a wiring schematic, it showed the auxiliary battery solenoid/relay was powered off the radio fuse/circuit with a yellow wire. There is a yellow wire there, larger than what would power the radio which has been cut by probably the previous owner or someone the may have hired.

Thanks again

 

[AuroraGirl]

I have 1989 suburban V1500, 350 gas engine. There's an auxiliary battery set up on the is truck that has a wire (black w/white stripe) going to the "S" side of the solenoid from the area of the fuse panel that is marked as "ACC", has three ports there, one of which is the black wire with white stripe.

My question is this, should ACC buss be powered with key on? There is no power there now, if there is supposed to be power with key on, where does power come from to power up the ACC buss? The power supply location, if on the engine compartment side, would be appreciated.

Previous owner may have put this auxiliary battery in or paid someone to install because the solenoid is not a continuous duty solenoid.

I powered up the "S" terminal to get the solenoid to trip, nothing, I'm assuming that solenoid is not good...

Thanks in advance for help.

what is being run on the "I" terminal?
thats for computers and ignition systems, but HEI in the 70s shouldnt need that , infact im pretty sure that wouldnt be desireable

Only advantage of I is it powers through crank , so you could run a relay for a PCM off it for example or ... im not sure what else

 

[AuroraGirl]

I have 1989 suburban V1500, 350 gas engine. There's an auxiliary battery set up on the is truck that has a wire (black w/white stripe) going to the "S" side of the solenoid from the area of the fuse panel that is marked as "ACC", has three ports there, one of which is the black wire with white stripe.

My question is this, should ACC buss be powered with key on? There is no power there now, if there is supposed to be power with key on, where does power come from to power up the ACC buss? The power supply location, if on the engine compartment side, would be appreciated.

Previous owner may have put this auxiliary battery in or paid someone to install because the solenoid is not a continuous duty solenoid.

I powered up the "S" terminal to get the solenoid to trip, nothing, I'm assuming that solenoid is not good...

Thanks in advance for help.

also thats a relay not a solenoid

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[strategic90]

I ended pulling the fuse panel, found someone had cut the the ACC Buss power supply wire, fixed that, power restored to the ACC Buss. I replaced the intermittent duty solenoid with a continuous duty solenoid, cured the issue. Auxiliary battery charging as should have been. Thanks for the help folks, I appreciate it all.