Brake controller question

[Riverdog]

I am installing a Tekonsha P3 brake controller. It comes with a "40A B+ trailering J-Case fuse" -- the instructions say if my vehicle has the TP2 option (auxiliary battery) then the fuse is not needed. If I don't have the TP2 option then I do need the fuse.

My truck is a 2004 Duramax -- don't all diesels have 2 batteries?? If so, is the second battery an auxiliary battery or would it require a 3rd battery to be auxiliary.

Any help on how I determine if I have the TP2 option would be appreciated.

[Riverdog]

I am installing a Tekonsha P3 brake controller. It comes with a "40A B+ trailering J-Case fuse" -- the instructions say if my vehicle has the TP2 option (auxiliary battery) then the fuse is not needed. If I don't have the TP2 option then I do need the fuse.

My truck is a 2004 Duramax -- don't all diesels have 2 batteries?? If so, is the second battery an auxiliary battery or would it require a 3rd battery to be auxiliary.

Any help on how I determine if I have the TP2 option would be appreciated.

[charliez]

You don't need a third battery. Those instructions are assuming a gas engine, one battery system.

I would install a SELF RESETTING 30 amp breaker. That way it will pop is a short happens, but will come back on again to give you brakes again.

[paz]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Riverdog:
Any help on how I determine if I have the TP2 option would be appreciated. </div></BLOCKQUOTE>
All GM trucks should have the options listed on the inside of the glove compartment door. They will be listed by RPO (Regular Production Option) number.

As you suggest, however, the second battery may be standard and not an option so TP2 will not be listed. If in doubt, adding the fuse will probably not hurt. A call to Tekonsha may be necessary to get a final answer.

[Sunny]

Riverdog
Did the fuse come with the brake controller or with the truck? If it came with the truck and you are using the connector under the dash then the fuse goes in the fuse box under the hood.

Tom

[Riverdog]

Thanks Sunny - I also called Chevrolet & they took my VIN and determined I do not have a TP2 option. The fuse came with the electric brake wiring harness that came with the truck. I'll install the fuse - I guess it can't hurt even if I don't need it.

Rick

[superduty]

I just saw the post. I went through the same thing recently on my '07 classic Dmax. You will need to install the fuse in the underhood fuse box. there is a "dummy" fuse in the spot, just pull it out and put in the 40A one.

[Riverdog]

Thanks Superduty -- I will install the fuse tonight. You've got an interesting situation...your signature is Ford reference yet you drive a Chevy.

[superduty]

yep, quite the dilema. When I registered back in December 2000 I was loving my '99 stroker and Lance camper. Now I have a Chevy and a TT, but can't change the username! Oh well I have fond memories of trips taken with the stroker and seeing the name reminds of that!

[Riverdog]

I finally installed this last weekend. Works like a dream. & Superduty - you were correct, I found the dummy fuse & put the real one in it. Thanks for the heads up.