Not sure where to post this, so I'll start here. I bought a club ford in 2010 and it has a Stack ST400 (ST400-4105) tach. Seemed to show the correct RPM. I tried to get the Tell-Tale to work but it never did. So, a winter project was to see how to fix this. I replaced the switches with the momentary type with toggles switches, not push buttons and put them right next to each other. Then the debugging started:
- Power ON: Needle goes behind logo then to zero (ok)
- Start car, need responds to RPMs as I would expect (ok)
- Run Self test (Max+Run), needs steps through RPMs (ok)
- Set shift light Max and Run switches work (ok, actually, never knew it had a shift light but I put a tester on the right wires)
Things that are strange:
- Instructions talk about a Green LED and Red LED. I only ever see a Green led behind the logo. Don't even see a red led anywhere
- Power ON reset doesn't work (with Max+Run). When I try it will eventually acts the same as a the self test does above.
- When I power off the car and power it back on, I loose the shift light RPM setting
- Power On and Run to set cylinders doesn't work (must already be set and stay set for a 4 stroke 4 cylinder engine right?)
- Max button doesn't work to see tell tale
The car is wired Battery -> cutoff -> fuse -> instruments. I checked that the proper wires are wired to the proper switches
Any help would be appreciated before I try Stack Co.