electrical testing

  1. J

    Please Help Can Not Figure Out Electrical Problem

    I just bought a 2003 mustang gt three weeks ago and I have been chasing an electrical gremlin. the person before had spliced in a custom alarm system and I found the tail light fuse was blown. some of the things that I have noticed is when the car warms up the battery light comes on. had the...
  2. D

    Electrical Tfi Electrical Testing Question

    Howdy, A quick question on an electrical test chart cited in jrichker's tech notes, "How the TFI ignition works in 86-93 model Mustangs." JPEG of test chart attached. Regarding test 3, "Power to TFI module, engine crank" I am getting around 10.6 volts, but the expected result is 8 - 10...