Len Todd
TY 4 Stroke God
Yah, there is no relay on many of these electric Automobile Temp Gages. You have to hook both the + 12 VDC wires to a keyed circuit. Also, doing so precludes depending on a rely, should you run across a gage that has one.
Hopefully, you did not kill your battery permanently. Before I installed my gage, I did not see a relay. But the wiring diagram looked like it was dependent on one. So, I set up up on the bench and had current flow in the battery wire right off the bat, even though the key switch wire was not yet connected. So I figured there was no relay in the gage either.
Assuming you tapped into the light circuit, it would be wise to add a in-line fast blow fuse that is of just enough value to run the gage. That way, if you short the gage wires, you will still have lights.
Hopefully, you did not kill your battery permanently. Before I installed my gage, I did not see a relay. But the wiring diagram looked like it was dependent on one. So, I set up up on the bench and had current flow in the battery wire right off the bat, even though the key switch wire was not yet connected. So I figured there was no relay in the gage either.
Assuming you tapped into the light circuit, it would be wise to add a in-line fast blow fuse that is of just enough value to run the gage. That way, if you short the gage wires, you will still have lights.
