996TT Work

Last night we knocked out some work on a 996TT. The car had sat for a few months on a trickle charger, but when the owner went to start it, the battery was dead. He tried jumping it, then eventually replaced the battery. Once he got it going though, his radio had no power.

First we got it up on the lift and knocked out the 6 month oil change on it. Pretty straight forward.

Since the radio had no power, I figured the fuse was shot on the back of the radio, pretty logical right? A lot of times when people try and jump start the batteries, the fuse will blow. It takes a pair of special radio removal keys to pull the radio out, and once we did, sure enough the fuse was blown on the back of the radio (10amp fuse). Put it back in place and we had power to the radio and all functions, but no sound from the speakers. Checked the main fuse panel and found another fuse blown to the amp. Replaced that, still no sound. Your next weak link the the system is the ignition switch. These can cause some really weird issues when they fail. Typically, you start getting a mushy key feeling when you turn the key in the ignition lock. Then eventually, you start getting really weird electrical issues, like the instrument panel will not light up, or the A/C stops working. I pulled the electrical connector off the back if it, and plugged in a new switch temporarily, turned the ignition on, and all of a sudden we had sound! Woohoo!

The little culprit. I keep these in stock because they are fairly cheap and fail ALOT.

After that, he was on his way!

996TTIgnition SwitchPorscheRadio Power

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3 Comments

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Jean-Pierre

March 22, 2011 at 3:09 PM

Can you give me the part# of that switch. I am trying to locate it in the parts cat. Was it 4A0 905 849 B ?. Thanks!

porschedoc

March 22, 2011 at 3:11 PM

That is correct. Last I heard, Porsche will not sell just the switch assembly, but rather makes you buy an entire new ignition module. I buy them through my wholesalers.

Jean-Pierre

March 23, 2011 at 2:28 AM

Thanks again !

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