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Mallory window switch.. not working. HELP!

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Old Sep 24, 2006 | 03:21 PM
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Todd157k
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Default Mallory window switch.. not working. HELP!

I just got a window switch (Mallory 646) but can't get it working. According to the threads I've read, the tach wire hook-up (green wire on window sw) should connect to the WHITE wire on the PCM. I soldered the wires together to make sure of a good contact. I get about 12 volt signal on the line at idle, about 16 volts at 2000 rpm.
I have the two orange wires from the window switch on the GROUND side of the No2 relay. One orange going to ground, the other going to relay for a ground when activated.
I set the window switch at 2700 L / 5700 H (8 cyl) like the (terrible) instructions tell you. Rev it up.. and nothing.
I tried disconnecting both orange wires and put an ohm meter across them. When I rev up the motor, no continuity. I think they should close.. shouldn't they?
Mallory tech isn't open on the weekends. I NEED HELP...PLEASE.

Last edited by Todd157k; Sep 25, 2006 at 12:12 PM.
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Old Sep 25, 2006 | 12:15 PM
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Todd157k
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Update: Once again the forums are the place for info. According to tech sup at Mallory, the white wire is correct on the C5 for the tach hook up. I must have a bad unit... even though it was quoted to me that they "never go bad".

I'm hooking up my next one with a male/female plug so I can bypass it.

Just curious, has anyone had problems with them going bad and not working?
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