12v ignition problem

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Old Jul 2, 2005 | 08:59 PM
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pyro_freak8's Avatar
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Default 12v ignition problem

i was installing an aftermarket radio into my new 88 crx si and ran into a problem... i was testing all the power wires with a multimeter and noticed that i was getting a weird problem with the 12v ignition wire... when you turn the key to the fist "click" you get a good 12v, but when you turn the key one more click( when the fuel pump primes... etc) it drops down to about 4v... does anyone know what could cause this? my ground is good... my 12v constant is good, and when you go to that first click the radio will come on, but click one more and it goes back off... thanks
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Old Jul 2, 2005 | 09:09 PM
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Default Re: 12v ignition problem (pyro_freak8)

Does the voltage come back up to 12V-14V if you start the car?
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Old Jul 3, 2005 | 10:31 AM
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it will go back to 12v without the cd player plugged in, but plugged in it only goes to about 5v...?
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Old Jul 3, 2005 | 11:43 AM
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anybody? any ideas?
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Old Jul 3, 2005 | 12:15 PM
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Default Re: (pyro_freak8)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pyro_freak8 &raquo;</TD></TR><TR><TD CLASS="quote">it will go back to 12v without the cd player plugged in, but plugged in it only goes to about 5v...?</TD></TR></TABLE>

Ok, if that wire is dropping to 5V with a load on it, it must have a cut or something... trace it back and see what you can find.
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Old Jul 3, 2005 | 02:06 PM
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do you know where exactly it traces too? fuse box or key cylinder?
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