2003 zr2- Ground wire to start relay - powered?
Thread Starter
|
New Member
Joined: Jul 2018
Posts: 3
From: Saskatchewan
2003 zr2- Ground wire to start relay - powered?
can someone explain why I would have voltage on the black wire (86 contact) on my start relay. I would assume this is supposed to supply a ground and activate the coil , pulling in the switch and allowing power to travel to the starter’s solenoid. Am I looking at a ECU issue here?
BF Veteran
Joined: Jan 2008
Posts: 2,750
From: Southern, Alberta
Pin 86 is one side of the coil of the relay, and if it's a negative trigger system then one side (ie pin 85) will always have power, and the relay will trip only when ground is connected to the other pin (pin 86 in this example). When power is supplied to one side of the relay, a meter will still be able to measure that there is 12v on that pin reading it through the relay coil because there is no ground present on pin 86. This is normal behaviour.
Thread Starter
|
New Member
Joined: Jul 2018
Posts: 3
From: Saskatchewan
That makes perfect sense. Thank you for the reply. Do you know what sends the ground to the relay? I have had no luck finding a proper wiring diagram. I am thinking it should be supplied from the ecu, but I cannot verify short of cutting open all the harnessing!
Thread
Thread Starter
Forum
Replies
Last Post
patton78
2nd Generation S-series (1995-2005) Tech
2
Nov 30, 2008 04:22 PM