The Saga continues:
This morning the family is coming for Christmas photos. Got up early and made sure the Model TT (1921) was running OK. Started up fine but a lot of noise, found the exhaust pipe had come loose from the manifold. Reconnected and tighten the nut. Re started just fine, backed it out of the shop and shut it down. Everyone arrives for Christmas photos and it will not start. Gurrrrrrrrrrrrrrrr
noticed no "buzzing" when the key is turned on
found no spark at plugs when cranking.
Where to next? Bad coil? switch?
Any help appriecated. New to Model T's.
bust out the volt meter, seeing as all the coils arent buzzing, id start with the switch.
Switch seems to work:
6.33 volts switch off at yellow wire
6.32 volts switch on Bat at yellow & grey wire
not finding any voltage anywhere else.
You said you have voltage on BAT, so now check yer COIL terminal on the switch for voltage with the key set on BAT. The COIL terminal is connected to either battery, magneto or nothing depending on which way you have the key turned. If you don't see any voltage on COIL then there's a problem with your switch Dave.
At the back of the switch, by pass that switch and "Hot wire" the BAT to the COIL wires, that will throw juice to the coil box.
Then hand crank over the engine, if no buzz from the coils....then pull the commutator (timer case) and look for missing pin on the rotor, as the timer isn't sending the ground to the coils if no buzz, as those coils should be in contact fully in the coil box, and must buzz if the circuit is completed by the timer.
Check the bottom conductor on the coil box with key on batt. It should have 6 volts on it. If it does the problem must be at the timer. It would be unlikely that all coils would go bad at once especially just after it has been driven. I suspect the problem is at the switch, but could be elsewhere.
Thanks for the advice.
Grandkids have me working on Christmas lights now, so the TT will wait until tomorrow. I did find a wire diagram and will make a jumper up tomorrow and see what I find.
Anyone have any idea what size fuse to use in a fused jumper?
another thought is that this is an original switch .... 91 yrs old.