I installed the hyper tech behind my speedo today, i thought everything was fine but i just went to the store and turned off my truck and the speedo lights and rpm needle was pulsing on and off, dim but still pulsing. I tried to disconnect the battery for about 10 mins but it is still doing it while the ignition is off. anyone have this issue or think of a way to trouble shoot it. Im going to reinstall the hyper tech with the neg batt terminal disconnected and see.
Please help if you can.