[Supras] Odd electrical system issues

[Hacker J]

The ECU has inputs for the headlights and defroster (an A/C) as these are used to stabilize the idle. They are not outputs, so the ECU cannot control these things, it only can determine if they are on or off.

Jon
90T


----- Original Message ----



> From: dgyoba at abstractconsulting.com> To: supras at supras.com> Date: Wed, 8 Aug 2007 10:17:15 -0600> Subject: [Supras] Odd electrical system issues.> > Well, I got the car fired up last night.> > Some wierdness with the electrical system.> > When the battery is connected, the headlights come on. They don't pop up (though they > will if you turn the switch on, and then they'll go back down (Still turned on) with the > switch off. They will switch from low to high beam if you change the position of the > switch, but they will not shut off.> > To me, this seems to be a short to the headlight relay, but I don't see what the engine > swap would have to do with this.> > Also, my tach does not work. The plugs from the '87T engine wiring harness seemed to > connect fine into the chassis harness for the '89NA. Does anyone know if these are > wired differently?> > My instincts are telling me that these are related, but I can't reason how.> > Some
 differences/similarities in the cars: The '87T had TEMS. My '89NA did not. Both > cars had ABS. My '89NA was an early production model (The motor mounts, for example, > fit perfectly.)> > Anyone have ideas?> > Dan Gyoba> '89 NA 450,322 kms, Turbo swap in progress> http://www.abstractconsulting.com/~dan> > > _______________________________________________> Supras mailing list> Supras at supras.com> 




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