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Old 10-02-2019, 01:10 PM   #3
hatzie
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Join Date: Oct 2008
Location: Wentworth, NH
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Re: Troubleshoot this electrical problem

The electrical portion of the ignition switch is on the outside of the steering column behind the knee panel.

If your ignition lock cylinder is borked it's a bit more involved to fix but not impossible. You will have to dig into the column to fix the lock cylinder.

18v + and super bright bulbs sounds like the regulator in your alternator took a dump.
You probably now have the honor of replacing any bulbs that were lit.
If the blower motor was on it may not be happy with you.
Basically anything that was switched on got some electrical stress if it didn't burn out.

There can be two fusible links at the starter and more on the J-stud... but this varies by year. The electrical diagrams will tell you what positions and how many.
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1959 M35A2 LDT465-1D SOLD
1967 Dodge W200 B383, NP420/NP201 SOLD
1969 Dodge Polara 500 B383, A833 SOLD
1972 Ford F250 FE390, NP435/NP205 SOLD
1976 Chevy K20, 6.5L, NV4500/NP208 SOLD
1986 M1008 CUCV SOLD
2000 GMC C2500, TD6.5L, NV4500
2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263
2009 Impala SS LS4 V8


RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.
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