Help! Isolator? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

78c20 · 04-23-2005, 03:35 PM

I have a 1978 Chevrolet C20 here in the United Kingdom that is probably ex-USAF.
I have recently imported ( from the USA ) a 350cid small-block with a few performance goodies fitted. Now the problem is, located on the firewall is a small ( approx 3x5inches ) finned metal box marked battery-isolator. The box has three terminals on it. Are these three terminals ie 1 for feed in, 1 for return to charge batteries ( truck has two ) and one to the lamp in the cab?
Can anyone tell me what this thing is/does and do I need it?
How should this be wired into the wiring-schematic?

( original engine was a straight-six if this helps )

Kindest Regards from the UK.

04-23-2005, 03:35 PM	#1
78c20 Registered User Join Date: Apr 2005 Posts: 2	Help! Isolator? I have a 1978 Chevrolet C20 here in the United Kingdom that is probably ex-USAF. I have recently imported ( from the USA ) a 350cid small-block with a few performance goodies fitted. Now the problem is, located on the firewall is a small ( approx 3x5inches ) finned metal box marked battery-isolator. The box has three terminals on it. Are these three terminals ie 1 for feed in, 1 for return to charge batteries ( truck has two ) and one to the lamp in the cab? Can anyone tell me what this thing is/does and do I need it? How should this be wired into the wiring-schematic? ( original engine was a straight-six if this helps ) Kindest Regards from the UK.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.