Speedometer

Is there any way to check the fuel and amp guages without installing them on a Jeep//
Cleaning house again and ran across four old style speedos..cant remember if they work or not and I hate to get rid of them before testing them...any ideas...??
Amp meter will tell me about the juice ..I am loking for something to make the guages to move...

 

Before you begin, remember that these are 6 volt guages and if you leave them connected to 12v for too long, they will burn out.

for the regulator test it is easier to read with an analog meter than with a didgital, but either can be used.

Terminals
S: sender
I: ignition
A: adjusted (regulated) voltage

the strap connects the A terminal of the two guages

temp guage:
with the S terminal grounded, momentarily touch 12v to the I terminal, the guage should peg. if it does not it is shot.

fuel guage:
with the S terminal grounded, momentarily touch 12v to the A terminal, the guage should peg. if it does not the guage portion is shot.

regulator:
attach a volt meter across the I and A terminals of the fuel guage. with it attached, connect the S terminal to ground and touch 12V+ to the I terminal, the meter should fluctuate around 5v. if it reads nothing, the regulator open. if it reads 12V, the regulator points are stuck together. if it fluctuates but averages higher or lower that 5v, it can be adjusted.

normal electrical safety rules apply

good luck

 

Thats exactly what I needed to know...thanks again ..getting the A1 ready for e-bay ..damn its going to be a long day

 

is the a1 6V?

 

Nope ..when Kathy did her restoration she went from 24v to 12v...I am cleaning out the back buildings and ran across some speedos and other guages ..I wanted to test them before I put them on e-bay this pm..
I have re-done the engine and frame this week on my 63 going to get the body kit ready for install this week then paint..Leaning toward the Coast Guard ..what do thinky about that ??