MSD Window Switch issue/problem
Thread Starter
TECH Senior Member
Joined: Nov 2001
Posts: 7,036
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From: Lake Zurich, IL
MSD Window Switch issue/problem OK... I have my MSD Window switch connected, on at 3000 off at 5800.
I gave it a constant ground, a constant power, and tapped the Tach line (Pin 10 on PCM , white). I cut both loops.
I connected a voltmeter to the yellow output wire. When connected to a positive and this wire it read at 11.5 volts which means the wire is providing a ground.
At 3000 RPM it registered 13.5 volts... did I wire something up wrong here? Or is it supposed to behave like this?
I gave it a constant ground, a constant power, and tapped the Tach line (Pin 10 on PCM , white). I cut both loops.
I connected a voltmeter to the yellow output wire. When connected to a positive and this wire it read at 11.5 volts which means the wire is providing a ground.
At 3000 RPM it registered 13.5 volts... did I wire something up wrong here? Or is it supposed to behave like this?
Re: MSD Window Switch issue/problem was that 11.5 with the car off? I bet it was.
at 3000 rpm's (or even idle, with the car on) the voltage is about 13.5-14
So thats the right reading to get
Ryan <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
at 3000 rpm's (or even idle, with the car on) the voltage is about 13.5-14
So thats the right reading to get
Ryan <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Thread Starter
TECH Senior Member
Joined: Nov 2001
Posts: 7,036
Likes: 1
From: Lake Zurich, IL
Re: MSD Window Switch issue/problem ok, the thing I'm perplexed about is, I thought that when it's below 3000 RPM the switch shouldn't provide any signal and when it's above it should provide a ground
Right now it's providing a constant Ground
Right now it's providing a constant Ground
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Joined: Nov 2001
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From: DFW, Texas
Re: MSD Window Switch issue/problem some meters have an auto range on them (most digital ones). make sure it wasnt reading 11.5 milivolts (mv). if thats not the case, you got me.
to test the switch easier, use a light (test light of some sort). also, make sure you are using the window switch to activate a relay, that triggers the item your activating (nitrous 'noid i assume). the window switch is not designed to take the amps of those noids, especially 2 of them.
to test the switch easier, use a light (test light of some sort). also, make sure you are using the window switch to activate a relay, that triggers the item your activating (nitrous 'noid i assume). the window switch is not designed to take the amps of those noids, especially 2 of them.
