Auxillary Battery. Option 1TP2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

TC70C10 · 11-19-2003, 04:08 PM

Anyone out there have the factory auxillary battery setup working in the Blazer or F.S. Truck. The option code is 1TP2.

I have a schematic in the back of my service manual. I have a relatively small gauge wire red, coming from a switch on the firewall. The wire from the switch goes to the starter.

I have the factory aux battery tray. I assume to hook it up I'd run a wire to ground and connect the red wire to battery positive.

I assume my alternator will charge both batteries. The aux battery can be used for winch(need $$'s) and trail lights.

I got a new bumper being built by Kennesaw Mountain Accessories with grill guard, brush guard and recessed Pro comps, so a winch is in my future.

Appreciate your comments and/or pics

Tim

Prerunner1982 · 11-19-2003, 05:50 PM

i have contemplated this myself and still may in the future. as far as the factory wiring..... i dont know. i want a manual switch to isolate each batter and when it is used.

Mike76251 · 11-20-2003, 01:36 AM

I have the set-up.
Factory driver's side tray, Huge starting battery in it, 5 ft. section of new welding lead going + to +, a bent piece of 5/8th copper pipe (4" long) going from the battery - to the fender well, a Optima red-top in the passenger side tray.

Mike76251 · 11-20-2003, 01:50 AM

Ze Pics,

This is the factory passenger side batt; You can see the welding cable coming in just under the edge of the Felpro sticker and going to the side post + lug on the Optima ,

Mike76251 · 11-20-2003, 01:59 AM

And now we see the driver's side batt.
The ground post is connected to the fender well with a piece of copper pipe painted black. The positive welding cable is going to the front through a factory hole in the rad. support,

TC70C10 · 11-20-2003, 11:30 AM

I'll try to borrow a buddy's digital camera this morning and post pics of my setup. I did take a look after I saw your pics and I do have the hole on the drivers side but I don't see a hole on the passenger side for the positive cable.

Thanks for the pics, Tim

Mike76251 · 11-20-2003, 01:08 PM

Quote:

Originally posted by TC70C10
I'll try to borrow a buddy's digital camera this morning and post pics of my setup. I did take a look after I saw your pics and I do have the hole on the drivers side but I don't see a hole on the passenger side for the positive cable.

Thanks for the pics, Tim

Your welcome on the pics!

I had to make that other hole on the passenger side rad. support for the cable to go through.
This is similar to how General did it on or trucks (no switch,no diodes) and I would have thought there was a hole over there but no.

TC70C10 · 11-20-2003, 01:13 PM

You list Alabama and California. Where are you from/live in Ala?

Mike76251 · 11-21-2003, 01:33 AM

Quote:

Originally posted by TC70C10
You list Alabama and California. Where are you from/live in Ala?

I work in California several months out of the year and live in Alabama part of the year.
NW corner of AL near Muscle Shoals.

TC70C10 · 11-21-2003, 11:06 AM

Well Mike, I guess you've heard of Huntsville, Athens and Madison.

I live between Madison and Athens off of US72.

Tim

Mike76251 · 11-22-2003, 12:43 AM

I am working in Courtland 1/2 mile off 72 now and worked Browns Ferry for years.

**Captkaos** · 11-22-2003, 01:55 AM

Just thought I would throw this in there... I am in Birmingham, AL.

Mike76251 · 11-22-2003, 02:26 AM

Well............that's three!

11-19-2003, 04:08 PM	#1
TC70C10 Registered User Join Date: Nov 2001 Location: Harvest, AL 35749 Posts: 337	Auxillary Battery. Option 1TP2 Anyone out there have the factory auxillary battery setup working in the Blazer or F.S. Truck. The option code is 1TP2. I have a schematic in the back of my service manual. I have a relatively small gauge wire red, coming from a switch on the firewall. The wire from the switch goes to the starter. I have the factory aux battery tray. I assume to hook it up I'd run a wire to ground and connect the red wire to battery positive. I assume my alternator will charge both batteries. The aux battery can be used for winch(need $$'s) and trail lights. I got a new bumper being built by Kennesaw Mountain Accessories with grill guard, brush guard and recessed Pro comps, so a winch is in my future. Appreciate your comments and/or pics Tim __________________ 1981 K5 Blazer 305, 4spd, 4x4, 4" Lift, custom bumpers, Warn 9.5 Ti Winch 1995 T10 Blazer 4.3L 4x4 (Son's) 2004 GMC Envoy 4.2L 2WD 2005 GMC Sierra Crew Cab Z71 4x4 5.3L 240 Fun Finder Travel Trailer Harvest, AL 35749

11-19-2003, 05:50 PM	#2
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,904	i have contemplated this myself and still may in the future. as far as the factory wiring..... i dont know. i want a manual switch to isolate each batter and when it is used. __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call

11-20-2003, 01:50 AM	#4
Mike76251 Senior Member Join Date: Mar 2003 Posts: 2,499	Ze Pics, This is the factory passenger side batt; You can see the welding cable coming in just under the edge of the Felpro sticker and going to the side post + lug on the Optima , Attached Images Last edited by Mike76251; 11-20-2003 at 01:54 AM.

11-20-2003, 01:59 AM	#5
Mike76251 Senior Member Join Date: Mar 2003 Posts: 2,499	And now we see the driver's side batt. The ground post is connected to the fender well with a piece of copper pipe painted black. The positive welding cable is going to the front through a factory hole in the rad. support, Attached Images

11-20-2003, 11:30 AM	#6
TC70C10 Registered User Join Date: Nov 2001 Location: Harvest, AL 35749 Posts: 337	I'll try to borrow a buddy's digital camera this morning and post pics of my setup. I did take a look after I saw your pics and I do have the hole on the drivers side but I don't see a hole on the passenger side for the positive cable. Thanks for the pics, Tim __________________ 1981 K5 Blazer 305, 4spd, 4x4, 4" Lift, custom bumpers, Warn 9.5 Ti Winch 1995 T10 Blazer 4.3L 4x4 (Son's) 2004 GMC Envoy 4.2L 2WD 2005 GMC Sierra Crew Cab Z71 4x4 5.3L 240 Fun Finder Travel Trailer Harvest, AL 35749

11-20-2003, 01:36 AM	#3
Mike76251 Senior Member Join Date: Mar 2003 Posts: 2,499	I have the set-up. Factory driver's side tray, Huge starting battery in it, 5 ft. section of new welding lead going + to +, a bent piece of 5/8th copper pipe (4" long) going from the battery - to the fender well, a Optima red-top in the passenger side tray.

11-20-2003, 01:13 PM	#8
TC70C10 Registered User Join Date: Nov 2001 Location: Harvest, AL 35749 Posts: 337	You list Alabama and California. Where are you from/live in Ala? __________________ 1981 K5 Blazer 305, 4spd, 4x4, 4" Lift, custom bumpers, Warn 9.5 Ti Winch 1995 T10 Blazer 4.3L 4x4 (Son's) 2004 GMC Envoy 4.2L 2WD 2005 GMC Sierra Crew Cab Z71 4x4 5.3L 240 Fun Finder Travel Trailer Harvest, AL 35749

11-21-2003, 11:06 AM	#10
TC70C10 Registered User Join Date: Nov 2001 Location: Harvest, AL 35749 Posts: 337	Well Mike, I guess you've heard of Huntsville, Athens and Madison. I live between Madison and Athens off of US72. Tim __________________ 1981 K5 Blazer 305, 4spd, 4x4, 4" Lift, custom bumpers, Warn 9.5 Ti Winch 1995 T10 Blazer 4.3L 4x4 (Son's) 2004 GMC Envoy 4.2L 2WD 2005 GMC Sierra Crew Cab Z71 4x4 5.3L 240 Fun Finder Travel Trailer Harvest, AL 35749

11-22-2003, 12:43 AM	#11
Mike76251 Senior Member Join Date: Mar 2003 Posts: 2,499	I am working in Courtland 1/2 mile off 72 now and worked Browns Ferry for years.

11-22-2003, 01:55 AM	#12
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	Just thought I would throw this in there... I am in Birmingham, AL. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com

11-22-2003, 02:26 AM	#13
Mike76251 Senior Member Join Date: Mar 2003 Posts: 2,499	Well............that's three!

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