Bonneville America Forums Forums Technical Forums General Tech How Do You Change A Triumph Tach Bulb?

I installed a Triumph tach yesterday and wondered how you change the bulb if it burned out. There is a rubber socket in back but it does not pull out easily and I didn't want to force it. Do you have to take the tach apart? Of course, no reference in the instructions or the service manual.

Can't say I looked too close when I installed mine, but those gauges usually have a bulb pressed inbto the back in a rubber grommet-ey fitting... odds on that's what you saw. I must look into replacing that (and the speedo light) with LED's.. not the sort of thing you want to be fiddling with periodically if there's a permanant fix for it.

Matt

The title sounds more like a joke...."How many bikers does it take to change a tach bulb?....seven, one to hold the bulb, and six to unscrew the bike!" ;^) sorry, couldn't resist.

Not to hi-jack your thread, but was wondering about the bulbs in the speedo, mine is dim at the 12 o'clock posistion.

later, Tom.

My tach had some condensation in it and I removed it to see if I could open it up. The unit looks like it's completely closed or not meant to be serviced. The only way to open it up (that I can see) would be to bend the metal piece that holds the 'glass' and go in that way. Only problem is that once you bend that piece it probably won't go back to it's original shape.

-Greg

In the last 2 ½ years I’ve replaced the upper bulb in my speedometer twice.
It’s pretty easy. You first remove the trip-reset knob. It’s held in by a small screw, which can be accessed through the end of the knob. Next remove the 2 screws, which hold the speedometer cable. There is one more screw near the speedometer cable, which holds the speedometer in its cup. You can now pull the speedometer out far enough to reach the light bulb. I’ve got an exploded view of the speedometer in a word document. If you want a copy let me know and I’ll email it to you.