Electrical problems, any ideas???

[Legend79]

Hi all, I have swapped my 1200 engine out for a sealed 1250 this weekend and I connected the gear indicator, plate and everything from the 1200 to the 1250. When I fired it up it ran no problem, but I have no ignition light or gear indicator lights, when I turn the ignition off the car keeps running until I turn off the cut off switch. This I suspect is the alternator wires on the 1250 being the other way round?? Would this also stop the other bit working at all?? Just wondering if its something stupid before I start chasing my tail with a multimeter testing the whole car!

[amp racing]

 think you have the power connected to the wrong side if the ignition switch..

[Legend79]

I hav'nt touched any of the switches, just unplugged the connectors on the engine side of the firewall and reconnected to connectors on new engine, wirings all the same as last season and never had a problem

[chadvarner85]

Did you make sure you hooked your ground wires back up?

[Legend79]

As far as I know everything is terminated as before with the last engine

[amp racing]

i'm going back to power supply.. i do not think you have power going into the switches but you have power going to the ignition.. pehaps the power line that should go to the dash is hooked into the ignition box direct... power too the box should run threw the switch then to the ignition.. you have one positve wire mixed up.. trace the wires back from the ignition box and see where it goes should go to the switch..

joe

[Legend79]

I'll double check the switches first then.

Thanks joe

[VMS Motorsports]

Alternator wired backwards

[s10custom]

Alternator wired backwards

x2, had mine wired backwards and it would continue to run after turning the ignition switch off.

Robert

[Legend79]

Would the alternator being wired backwards also affect the gear shift indicator, I've got the light up type not the digital

[VMS Motorsports]

Not sure, don't run them. Power has to come from somewhere though, so its a possibility.
Just switch the wires and see