Ignition Switch doesn't engage starter?

urq urq at pacbell.net
Fri Jun 16 09:45:57 EDT 2006

... while I'll agree that the ignition switch modules are one of the higher 
frequency replacement modules, it sounds as though the module may have been 
replaced recently, and if that is the case I don't think I'd be recommending 
another.  It could be the mechanical part of the switch ... given the list 
of other things that have been replaced that might be the culprit.  I'd 
still recommend hooking up a voltmeter to the solenoid to see how much 
voltage is getting to the starter when cranking.  If it is anything less 
than 10v, the problem is electrical ... and don't forget the braid that 
connects the engine block to the frame of the car!

Steve B
San Jose, CA (USA)

> These switches fail frequently.  I've done 4 on my mom's 1995 A6Q.  One
> after 6-7 years.  Another after an additional 15-18 months. Another
> after 6 more months. The final one is now approaching its first
> birthday.  Hopefully this one will see many parties.
> Make sure the wires in the harness, whcih are bent at a 90 deg angle to
> mate to the socket, are not broken.
> Its 99% likely its yet another switch, on its way to that great switch
> junkyard in the sky.
> Grant
> On Jun 15, 2006, at 2:57 PM, Duane, Andrew wrote:
>> My mother's 1997 A4 has been having a frustrating problem lately. It's
>> almost like the ignition switch doesn't rotate far enough to engage the
>> "START" function sometimes. 9 out of 10 times, it starts just fine. The
>> 10th time, it takes 4 or 5 tries to get the starter to go.
>> The ignition switch has been replaced twice (as have the battery
>> cables,
>> battery, and starter motor), but the problem persists. Is there a
>> possibility that whatever is behind the switch is slightly bent or
>> something? Or are all of the mechanical parts inside the switch itself?

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