×

Wiring harness diagnostic system

  • US 6,222,374 B1
  • Filed: 01/29/1999
  • Issued: 04/24/2001
  • Est. Priority Date: 01/29/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. A fault detection circuit for an electrical system having output transistors connected to a plurality of conductive lines for providing outputs over the lines to corresponding loads, the output transistors switchable between first and second states, wherein in the second states, the output transistors are in an on condition and in saturation with a low collector to emitter voltage (Vce) when the lines are properly connected to the output load, the fault detection circuit comprising:

  • a sensing circuit connected to the output lines;

    a control circuit for selectively switching the transistors to the second state; and

    wherein the sensing circuit is responsive to presence and absence of the low Vce indicative of the saturated condition when the second state is selected to provide an indication if the lines are improperly connected.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×