[Tigers] Instrument Sttabilizer frolics

[Rollright at aol.com]

Hello,
 
Well after looking under the dash in the usual place (and unusual ones as  
well), my trusty local garage found the verdamnt  "I.S." where it was  
supposed to be, but covered and obscured by a dealer-installed hazard  warning 
flasher. I forgot to look under it.....duh.  BTW, the Steve Laifman  seat 
removal pins have worked great.
    Troubleshooting: my IS-governed gauges gave  strange readings. The temp 
seemed to run high (on a hot day over 250  indicated even with Derale fan 
and fan shroud bottom extension from Canada).  Fuel gauge was funky, reading 
OK on the right or full end of the  gauge, but when it hit about 2/5 full, 
it dropped to zero. My .IS,  under  test yielded 5 Volts and was of the newer 
semi-conductor type. Got a new one  from SS and it measured 10 Volts 
installed. 
    With new IS installed I tested the temp gauge this  weekend in full 
engine-running heat-soak. What had been 250 + was reading 195.  With the 
electric fan running it goes even lower. Gas hasn't gone down far  enough to 
report as of yet.
    Make note: if your fuel and especially temp gauge  read where they 
shouldn't, check the Instrument Stabilizer voltage!
    BTW: I took the old IS apart and there are only 3  electronic 
components inside: an NPN transistor labeled FZT651 and two ancillary  surface mount 
components that look like either capacitors or resistors...that's  it.
One of the ancillary components is dead (hence the half voltage).
 
Hope this is of help to someone.......
 
Best regards,
Jim Armstrong