Mercury Cougar Owners banner

1 - 8 of 8 Posts

·
Registered
Joined
·
1,853 Posts
Discussion Starter #1
I just purchased a 68 xr7 with the 390x code engine. All gauges work cept the amp gauge, does anyone have any ideas where I should start with this? Thanks
 

·
Registered
Joined
·
1,853 Posts
Discussion Starter #3
Yeah but wana get it working. Not sure if it is the gauge or a wire or regulator?
 

·
Registered
Joined
·
384 Posts
The amp meter has nothing to do with the regulator. It is really a sensitive voltmeter that is measuring voltage drop across a piece of wire in the wiring harness from the starting solenoid. To check that the meter and wiring is good remove a red single wire from the battery side of the starting soleniod, it may have a yellow colored ring connector, momentarily touch a AA battery between this red wire and a thick black wire that was on the same post. The amp meter should swing one way. Reverse the battery and it should go the other.
 

·
Registered
Joined
·
1,853 Posts
Discussion Starter #5
Ok that is easy enough. If the gauge is not good? Where would I find one of them? I have received a catalog from AutoKrafters and one for Johns Cougars in Michigan but neither has any gauge's for sale.
 

·
Premium Member
Joined
·
2,303 Posts
Try WCCC, they should have it.
 

·
Moderator
Joined
·
11,000 Posts
The amp guage in a '67 - 68 XR-7 is a shunted unit, so very little current actually goes through the meter. The meters lose their sensitivity over time, and the only way to get it to function is to replace it with a NOS unit.

Really, a volt meter is a better solution as it gives better, more relevant information. The RKTMN can fix you up with a nice unit that looks like it belongs in your dash.

I have an NOS original amp guage available for 67-68 XR-7. Send me a PM if interested.
 
1 - 8 of 8 Posts
Top