Re: 1973-1991 Dual fuel tank systems theory of operation
That would only shut off your fuel pump power feeding into the NL2 subharness. The hot start doesn't have anything else to do with the NL2 wiring.
Step back and look over the basics. Page A80 or A81 of the 1991 wiring diagrams.
If the valve is malfunctioning it's probably in the control wiring or the switch itself is fouled up somehow.
__________________
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.
|