Why might this relay be in use?
I’m slowly unwinding all the electrical changes made to my 99 Suburban that was formerly operated by a municipal fire department.
This relay appears spliced into an engine harness bundle at one end and the passenger side battery at the other end (red wire with an in-line fuse). The truck dies if this wire is removed at the battery. At the harness end it looks like a red harness wire was cut and spliced to the blue and yellow wires from the relay.
Not sure why this modification was done other than a possible anti-theft option. Any other thoughts? I don’t have the schematic for this truck like I do my 72s and want the wiring back to original.
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1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547
1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308
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