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post #1 of 5 (permalink) Old Jun 13th, 06, 05:53 AM Thread Starter
 
Join Date: Jun 2006
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no voltage

I have a 69 ss (350) with a TH 350 tranny. I have no voltage at the fuse block. I disconnected the bulkhead harness connector at the firewall and there is 12 volts at the pin (red wire).
Also there is continuity from the bulkhead pin to each of the fuses but there is no voltage at the fuses when I reconnect the bulkhead connector.
Where should I be looking?
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post #2 of 5 (permalink) Old Jun 13th, 06, 03:03 PM
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Re: no voltage

Quote:
Originally Posted by my69rs/ss
I have no voltage at the fuse block.
Quote:
Originally Posted by my69rs/ss
I have no voltage at the fuse block.
Where did you test? Only things that have battery power are hot all the time, (ie...brake lights fuse, cig/ctsy fuse and BAT terminal. The key must be on for everything in fuse box to be hot. Check again and post back.

Greg U

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post #3 of 5 (permalink) Old Jun 14th, 06, 12:34 PM Thread Starter
 
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Re: no voltage

HI Greg,
Thanks for the fast response. No voltage at any of the fuses (hot side). There is definitely 12 volts at the spade connector on the firewall. None of the accessories work ( interior lights, head lights, etc). I'm going to remove the fuse block and inspect it.
Pat
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post #4 of 5 (permalink) Old Jun 16th, 06, 06:36 AM
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Re: no voltage

You've got a bad connection somewhere. Either the pin connecting the two halfs of the firewall connector are bad, mislocated, etc., or you've got a resistive connecting somewhere else in the system. Try pulling all the fuses and see if your voltage magically reappears at the fuses. I bad connection will present resistance to the power circuit, and if you attempt to pull current through it, your voltage will drop to zero volts. Remove the fuses which disconnects the loads, and the voltage reappears.

When you measure voltage at the spade connector, did you use a voltmeter? If so, try a test lamp instead. The test lamp will pull a little current through the circuit. You may see no voltage again when the spade is loaded with the test lamp. If that looks good, focus on the connection at the firewall and beyond.

Are the pins in the two connector halfs lined up? Check voltage on the fuse clips at each end of the fuses. Sometimes, the corrosion on the clips can be enough not to power the fuse. In other words, with the fuse installed, you may see one clip is hot, but the other clip, and possibly the fuse are at zero volts.

Dave
========================
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI
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post #5 of 5 (permalink) Old Jul 3rd, 06, 05:18 AM Thread Starter
 
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Re: no voltage

I found a bad connection (intermittent) in the 12 volt supply to the voltage regulator. I fixed that and now there power to the fuse panel and the accessories work. However, when I turn the ignition key to start there is no response, not even the starter solenoid. Also the GEN light on the dash is partially illuminated when the ignition key is in the OFF position.
I checked the alternator for a short but that seems to be ok and checked the voltage regulator and that seems to be ok.
What else to check.
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