speedo and tack lighting

[keith]

Hi All,
Can't seem to get the bulbs in my 77 750K to illuminate. bulbs are good. Where sould I look next.
this is a great forum and everyones help on my can chain tensioner adj. was very helpful.
Keith

[sgtslag]

Take a look at the wiring diagram/schematic, in the Factory Service Manual (available here)  and trace it down.  Look at the battery, and the light bulb in question, and divide the circuit in half:  measure the voltage present at that point, with the key turned on.  If there is 12V, divide the remainder of the circuit in half, and repeat the process -- the fault is somewhere between the mid-point of the circuit, and the bulb in question.  If there is 0V present, divide the front half of the circuit in half, and test again for 12V.  Keep dividing the circuit in half, until you locate the fault.  It could be a bad connector, open wire, or something burned through.  Good luck.  Cheers!

[TOOLS1]

Check the ground for the instruments. 99% of all wiring problems are due to a bad ground.
TOOLS