Electrical Nightmare.......

MA70-3.0GT · 08-04-2010, 12:36 PM

My thoughts exactly, multimeter ftw. Test lights are fine on old-tech but for anything like the Supra with ECU controlled circuits a multimeter is a must, can do a lot of damage with a test lamp & an ECU!!! Oh & plug everything back in now too, if it runs sometimes then whatever is causing the fault can't really be a short or you'd be blowing fuses, flattening batteries overnight or starting fires...

tbh the intermittent bit does sound like possibly a relay or bad connection, do you have a spark when it's cranking but no-go? this will at least tell you which side to be looking for the fault rather than trying to trace back from the ign. switch loom.

08-04-2010, 12:36 PM	#9
MA70-3.0GT 12psi boost Join Date: Oct 2009 Location: Crewe, England Posts: 356	My thoughts exactly, multimeter ftw. Test lights are fine on old-tech but for anything like the Supra with ECU controlled circuits a multimeter is a must, can do a lot of damage with a test lamp & an ECU!!! Oh & plug everything back in now too, if it runs sometimes then whatever is causing the fault can't really be a short or you'd be blowing fuses, flattening batteries overnight or starting fires... tbh the intermittent bit does sound like possibly a relay or bad connection, do you have a spark when it's cranking but no-go? this will at least tell you which side to be looking for the fault rather than trying to trace back from the ign. switch loom. __________________ '89 MA70 Supra GT aero 3.0turbo JDM, Rebuilt motor, K&N intake, 3" stainless turbo-back. New turbo and braided line kit... '89 Honda NC27 400, NC23 cams, open pipe, PC36a shock & possibly Showa USD forks... '83 Yamaha 29R XJ750E-II, number 69 off the line, only runner in the country? Original except Koni shocks '95 Honda PC26 CB500R, Winter hack, hateful, trying to sell it I'm not paranoid, they really ARE after me!!!