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Old 07-03-2022, 10:55 AM   #138
hatzie
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Join Date: Oct 2008
Location: Wentworth, NH
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Re: 1973-1991 Dual fuel tank systems theory of operation

Quote:
Originally Posted by 52napco View Post
OK ...now I don't have power to the switch...I can run a wire to the positive side of switch and it works..so if I am understanding this correctly the switch power comes from the tan and white wire out of pump relay ?
On TBI yes
On carbureted and diesel power comes out of the fuse panel
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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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