Relay/Isolator
Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=64871
Printed Date: May 10, 2025 at 11:12 PM
Topic: Relay/Isolator
Posted By: jimd2p
Subject: Relay/Isolator
Date Posted: October 23, 2005 at 3:12 AM
Looking for just a little wiring help here. I have a power inverter in the back of my work truck to run my computer, printer and a few other items. After leaving it on and killing my battery a few too many times, I decided to install an isolator to work as an ignition on relay for it.
I am using a Stinger SR80 isolator. I have it working fantastic to turn the inverter on with the key on, engine off. But when I start the vehicle, it loses the power signal and sets the no voltage alarm off on the inverter and kills it.
This is a 2003 Chevy Express van (3500 series). I used the orange wire at the ignition harness. Can someone let me know if there is a wire that is ground at Key on/engine off, then goes to 12 volt at cranking and while running?
Thanks in advance for the help.
Replies:
Posted By: chriswallace187
Date Posted: October 23, 2005 at 5:06 AM
There should be a pink heavy gauge wire in the ignition harness that is hot in run or start. Make sure to meter it, but that should be the right color.
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