I was installing a new head unit and amp with sub,. box and when i connected the battery again and turned on the car, but didn't start it, the checkengine light was blinking and a weird clicking sound was coming from the engine. Then the engine fan kicked on, then went into supermode and then shut off. It kept cycling through this.

The head unit doesn't work but all other electronics do.

any idea whats wrong? short somewhere? loose connections?

 

Thats weird man... i dunno how or what you did wrong there...

 

I would disconnect the HU and the power for the amp, and see what happens.
When you wired the HU, did you use an adpt. harness or did you hard wire it? 94

 

I disconnected the battery and installed an amp with sub as well as a pioneer headunit with a harness. I basically know what i'm doing...

So it is near completion and I connect the battery to test it out. I turn the car to ON but don't start the engine. The 'check engine' light comes on and blinks, the engine fan runs for a few seconds and shuts off, then starts and repeats, and there is a clicking noise coming from the engine bay as if something is switching on and off repeadly, (alternator?).

The manual says the blinking light means an engine misfire was detected, but I had the car off and disconnected! Did I screw something up with the wiring?

None of the audio components work including the head unit.

The car starts fine but I'm afraid I'm ruining something by driving it.

I disconnected the HU, power for the amp, and reconnected battery, still same weird noises.

Please help me, I just got this car and I already found a way to hurt it!

 

i just found out that I activated a diagostic mode for the ECU which caused the fans and clicking. But no idea why the audio doesn't work.

 

which polar of the battery did you disconnect

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cardoobie is back &raquo;</TD></TR><TR><TD CLASS="quote">i just found out that I activated a diagostic mode for the ECU which caused the fans and clicking. But no idea why the audio doesn't work.</TD></TR></TABLE> Have you checked for power to the HU, both the switched power yellow/red and the constant power white/yellow or blue, on the oem radio harness, the switched power fuse in in the incar fuse box and the constant power fuse is in the engine bay fuse box, [7.5A], the oem constant power, white/yellow or blue, may not be enough power for your HU, it may need more then 7.5A, DO NOT replace the 7.5A with a bigger fuse, SEVERE damage can be done to wiring, if the HU needs more constant power, run a fused line from the batt. to the HU, just like you do with the amp, 12 or 10 gage wire will work, also run a ground wire from the chassis of the HU to a good ground behind the HU. 94

 

lol, i had this happen to me once also, i think it could be just a minor fuse problem