pauly

HELP!! i've got a 300ZXTT, on a 90, Jap' Import to the UK.
i'm losing speed display at the speedo. i've tried replacing my
"KPH-MPH" convertor, re-soldered and re-insulated the
cables to the rear of the dash, checked all soldering is OK on
the speedo head, replaced the speedometer pinion assembly
&
tried to trace the loom but can only get as far as the engine
bay before i lose sight of it. has anybody else ever had this? it doesnt seem to be anything to do with bumps in the road, but i do get my display back when its hot. I'm desperate, i'm losing PAS & HICAS

Cheers.
Pauly