Towing H3 behind motorhome?

[tomgcherry]

OK...FOLKS...Here is what Brake Buddy Says...DO NOT, I REPEAT, DO NOT USE A BRAKE BUDDY on a 2008 H3. I can NOT speak for prior years. The H3 has an ELECTRO-Hydraulic system...NOT the STANDARD Vacuum Assist on Hydraulic System. The Brake Buddy is designed for a Dead (Bled Down) Pedal. The Hummer (H3) Electric Boost is NEVER SHUT DOWN. Therefore, you will LOCK UP THE WHEELS...even is you try to turn the pressure down ALL THE WAY. This is also the system that they Hybrids use (engine is NOT always running...therefore NO continuous Vacuum boost). Going to cost me more $$'s....people suggest the SMGI or other systems...still doing research.

[Donald Smith]

Oh my friends
H3 has electric assist brakes. What I did was relay power to the assist system while also disconnecting power from the H3 power assist and changing to the RV, while also charging the H3 battery . I did this so I would not drain the H3 battery and not leave the key on. I just plug in my towing cord all this happens, its simple wiring and relay. Brake Buddy works fine if you have power assist working which it is. I amazed the folks at Brake Buddy. If anyone is interested PM me and I will send the drawing to show you how.

Don

[Donald Smith]

FYI
American Eagle MH and 2006 H3 Lux. Demco towbar.