I recently changed my Radiator core support and A/C Condensor. When I put everything back my truck would not start. I turn the key and the THEFT light stays lit. Then, when I turn the key back to off the interior lights flash multiple times. Only sometimes will the THEFT like blink. Nothing is working inside my truck except the lights. My radio will not come on, nor the windows work. I have tried this several times with same outcme. Sometimes you can here the starter, just a few klicks and thats all. When I put the knew radiator core support on I had to weld it. I did not disconnect the battery and I am wondering if this affected my truck.

Thanks, Tim (BACK YARD MECHANIC)

 

I would say you fried one or more modules. I have no idea where you would start the diagnosis. I would double check the battery and connections for the hell of it but it's possible you just learned a very expensive lesson.

 

What do you think about the possibility that it may be the P.A.S.T. device?

 

I just pulled the fuse cover off and it seems that both relay fuses are klicking at the same time the interior lights and theft light are flashing. Any ideas?

 

I can't believe it was just the battery. I did not understand because I put my volt meter to it and it was fine. The lights flashing threw my off. Thanks for all the help.

 

Glad that's all it was and thanks for letting us know.