Triumphrat

sandblaster

i have a 96 t-bird that has started blowing the fan indicators fuse. when it does the turn signals brake lights low beam and instumaent lights go out the high beam and emergency lights still work. i have not found any grounded or exposed wires. any ideas. thanks.

WoodsieIII

Thats a worry I wouldnt ride it. changed anything recently?

__________________
I believe there is no such thing as accidents. When I ride I must leave enough room for others stupid mistakes, added to that is enough room to make my own.

jimmyj900

I'm looking at it, but it's pretty wierd. Gimmie a little time...

Jim

__________________
My NEW Photo Album: http://s279.photobucket.com/albums/k...0Head%20Stuff/

Otrorob

Very recently I had the same problem with my 98 TBS. I was on an extended trip through New England and lost my turn signals when I hit traffic entering Boston.

The fan circuit and the turn signals share the same fuse on the TBS and the fuse was blowing whenever the thermostatic switch closed to activate the cooling fan. I had no problem in cool weather or when there was airflow over the engine, but as soon as the temperature was high enough the switch would activate and the fuse would blow.

The problem was a siezed cooling fan motor. The fix was a new cooling fan which cost over $200 from the dealer!

__________________
Photo Album

sandblaster

it blew last night as i was putting it in the building for the night and it had not been run in 8 hours. all can think is there mat be something in the headlight housing chaffed, but then again last night it happened when i applied the rear brakes, maybe the switch?

jimmyj900

Take a close look under the fuse block and the connector to the block.

I'm not sure but it looks as though the fan/turnsignal fuse may be picking up the load of the lighting circuit and around the fuses would be the most probable area for a short.

I'll keep thinking about it...

Jim

__________________
My NEW Photo Album: http://s279.photobucket.com/albums/k...0Head%20Stuff/

sandblaster

i'll check that tomorrow

sandblaster

i changed handle bars 6 weeks ago so i checked the switches to make sure everything is ok, i checked all the wires in the headlight housing it's ok' don't see any corrosion or anything around the fuse block, i guess i need to check the fan switch any idea how to do that. i also need to check the fan motor it's been to cold for it to kick on.

[ This message was edited by: sandblaster on 2006-11-04 18:21 ]

ToddZimardo

I am having the same issue on my 96 Tbird.

Can't say I checked every wire mentioned for corrosion etc but will need to consider changing out the Fan motor as noted.

Thanks to all for the info!

jimmyj900

Preface: I've studied the schematics in the Triumph shop manual and the Haynes manual for the Classics models and could not come up with a reason for the symptoms described.

The schematic in both manuals is for a European version with a headlight switch.

There have been a minimum of two European versions of the Classics wiring harness and neither schematic in my manuals is identified as an earlier or later version.

Mutato is a 2000 US model with the later version harness and no headlight switch.

Testing: I removed the fuses, one at a time, from my bike to try and duplicate the symptoms.

With the fan/turn signal fuse removed, both emergency flashers and turn signals were disabled. All other lighting circuits worked normally.

With the tail/stop light fuse removed, the flashers/signals functioned normally but the instrument illumination circuit was inoperative. All other lighting circuits worked normally.

The symptoms described in the original post could not be duplicated.

Conclusions: The symptoms described are associated with an early wiring harness version and probably only with a US version.

The failure of the fan fuse is probably the result of a defective fan or the installation of a 10 Amp fuse instead of a 15 Amp fuse in the #4 fuse position.

Hypothesis: There is a miswire in the right handgrip connector such that the jumpers used to bypass the Euopean headlight switch are either cross-connected or shorted to each other in such a way that power is being transferred from one circuit to the other. The behavior described in the frst post of this thread would seem to indicate this.

According to the schematic in the shop manual, it appears that on the US version there should be a jumper from pin 3 to pin 1 and a second jumper from pin 8 to pin 6 of the connector.

It should be possible to verify this by swapping in a later model grip and switch assembly.


I cannot verify the jumper configuration on my 2000 model at this time.

Jim

[ This message was edited by: jimmyj900 on 2006-11-05 13:46 ]

__________________
My NEW Photo Album: http://s279.photobucket.com/albums/k...0Head%20Stuff/