Classic instruments speedo calibration button?

65Rob

Member
Nov 29, 1999
250
1
19
Victoria, BC, Canada
Trying to wire the classic instruments 5 gauge set for 65/66 mustang. Says to connect to 2 wires on the speedometer calibration button. Anyone know where said button might be? There's 2 knobs inside the speedo but they don't seem to have loose wires and I don't want to put a hook in there and start pulling. The instructions don't have an illustration showing where it is. They're closed on the weekend so I can't call tech support until Monday
 
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wicked93gs

10 Year Member
Sep 30, 2006
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Nashville TN
Picture003-33.jpg


My Marshal Bluelines had little pushbuttons used for calibration and peak recall...
 

65Rob

Member
Nov 29, 1999
250
1
19
Victoria, BC, Canada
Well that looks convenient. I can't even find the button let alone wires to connect to it. There's a filter switch but that's not it. There's nothing on the front and this is the back
 

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wicked93gs

10 Year Member
Sep 30, 2006
948
113
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Nashville TN
Is that a switch underneath the wiring connector? I can't provide much help on that really, your best bet is to call Classic Instruments. I am used to DIP switches and header pins being the norm for most modern gauges, so I was expecting something of the type.
 

65Rob

Member
Nov 29, 1999
250
1
19
Victoria, BC, Canada
Yes it's the filter button, switch from ECM to VSS so nothing to do with calibration.
I called them and I'm on the call back list so hopefully I can get it sorted out today.
 

65Rob

Member
Nov 29, 1999
250
1
19
Victoria, BC, Canada
Mystery solved, this unlabeled thing of which they gave me two of, is the calibration button. It's totally remote, nowhere near the speedometer.
Great tech guy, had answers to all my questions without having to dig into it. Turns out that the American autowire harness provides some wires that also are provided by the classic instruments harness. Naturally that can be confusing for someone like me that has limited auto wiring experience.
 

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