The Stovebolt Site Forums The Shop Area The Electrical Bay what is this?

'53 3100
216
12v system

i'm putting in a 12v voltage regulator and i swap over the battery, armature and field wires from the old regulator, but there's another box mounted on the firewall.. it has a field wire going into it, and nothing going out of it. the other side of the box is labeled "IGN".. looking at the electrical diagrams, i'm not seeing where an ignition switch wire would go to this box, and i can start and drive the truck just fine with just "FLD" going into this box. i don't want to remove it if i don't know what it's for. the "FLD" wire going into it has the proper cloth wire tracer for being a field wire, should i just put it on the field terminal on the voltage regulator and have two there, or what?

the mystery box with the black tracer wire going into it

mystery box next to my old regulator

new regulator

The mystery box next to the regulator

looks like the horn relay to me.

See photo of my replacement nos horn relay

@ photobucket

http://i669.photobucket.com/albums/vv57/glp0329/Horn%20Relay/HornRelayDelcoRemyGMNOS_zpse4007185.jpg

George
in
New Jersey

so, if that's the horn relay, and the other box is my volt regulator, why do i only have one wire going into the regulator and a battery, armature and field wire going into the horn relay? that box you posted with the part number looks just like what i thought was my voltage regulator..

according to the electrical diagram, the horn relay should go to the horn itself, the battery and then to the horn button.. but this thing was wired up to the battery, armature and field wire.. ?

if that's the case, somebody wired my horn relay up like it was the voltage regulator.

Maybe it's a headlight relay ???

The horn & headlight relay look very similiar.

George
in
New Jersey

Hy gmtjr, the box with only an "ign" and field terminals is a Chrysler alternator voltage regulator I believe. Your second picture with the two items together shows a horn relay with the Chrysler voltage regulator. The third picture is of a generator voltage regulator. You probably have some wiring to verify, good luck.