hey new here have allison 5pd.was workinng good just installed a high idle kit after completion i tried to use it would not work and showed a code of po700 transmission control system malfunction tried to erase worked till i drove truck then threw code again also on tranny selection it only shows p rev and then goes blank anyone no how to fix thanks in advance
LB7: trany
- Thread starter kellock
- Start date
hi i went intothe ecm opened slot number 71 inserted wire and plug connector run wire into plugin on brake pedal hooked into slot 7 supposed to be all u have to do start truck press round button on cruise rpm should climb to 1200 press resume should climb to 1800 does not work web site is lb7 high idle install and hookup hope this helps thanks
Sound like you hooked to the wrong brake light wire to me. Try unhooking it and see if it works then. Also would help to know what truck as there are 2 different gens of lb7.
tranny
hey there was only one code came up it said to splice into number7 wich is what i did its a 2003 lb7 ii clear rhe code th en start the truck when i put it iin gear the engine lite comes on againn and i lose the gear selection when it gets to netural i was wondering if i missed number 71 and plugged into 70 or 72 by mistake anyone no where i can find out where i can find out what functions each number is for.i cut the wire to the brake petal killing the signal from the ecm leaving the connection in the .ecm dead.so the truck should run the same as be for the wire was inserted into the ecm. right or wrong?
hey there was only one code came up it said to splice into number7 wich is what i did its a 2003 lb7 ii clear rhe code th en start the truck when i put it iin gear the engine lite comes on againn and i lose the gear selection when it gets to netural i was wondering if i missed number 71 and plugged into 70 or 72 by mistake anyone no where i can find out where i can find out what functions each number is for.i cut the wire to the brake petal killing the signal from the ecm leaving the connection in the .ecm dead.so the truck should run the same as be for the wire was inserted into the ecm. right or wrong?