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Bad GEM or Bad Ignition Switch?

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Old Mar 10, 2011 | 07:33 PM
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Bad GEM or Bad Ignition Switch?

'97 F150 Scab 4.6 auto 2WD
Check me out on this: factory radio plays & key-in chime sounds with ignition switch off & key removed. This results in dead battery in a few days time. I’ve had it in, previous to the phantom radio/door chime occurrence, to the only pro mechanic that I trust and he pulled down the GEM and it was uncorroded and dry. He said that it looked good to him since he has seen bad ones before.
Question: shouldn’t I throw $20 Ignition switch at it (versus $200+ GEM cost) to cure this 2 yr dead battery PITA?

Thanks for your help.
 
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Old Mar 11, 2011 | 06:02 AM
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I'd say it's a no-brainer to try the switch first unless you have some better evidence that the GEM is at fault.
 
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Old Mar 14, 2011 | 05:27 PM
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Now There's No Power to Starter

First of all - Joe thanks for your reply. Do you know if the start circuit goes through the GEM? I haven't replaced the switch yet - so I'm still wondering if it is the real culprit and not the GEM. Its just I see so many posts about bad GEM problems and none about a bad switch. Maybe this problem of no power to starter circuit would isolate it to one or the other.

What do you think?
 
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Old Mar 14, 2011 | 07:01 PM
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Do you know if the start circuit goes through the GEM?
The starter circuit does not go through the GEM.


I'd suspect the I/P fuse box. The switch is easy to test...
 
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Old Mar 30, 2011 | 09:30 PM
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Resolved

Turns out there was 2 problems: no power to starter was bad firewall solenoid & spooky radio/key-in chime was a bad GEM. Solenoid would only click and failed during the GEM - I/P fuse block trouble shoot. Replaced GEM with one from '98 and no problems with it this last week.

Thanks for the help.
 
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