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Old 08-03-2019, 03:05 PM   #10
hatzie
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Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,916
Re: No spark, new junk

If the pump is working in RUN then it's not likely the problem.

Do you happen to know what year that fuse panel, and likely the cab harness, came from? The fuse panel layout doesn't seem to match the 1984 wiring diagrams.

The Neutral safety switch simply interrupts the CRANK wire from the ignition switch to the starter. Despite my previous statement it's unlikely to be the power problem. I somehow misunderstood your post and thought it wasn't cranking. If she isn't cranking then look at this switch.

Choke is powered by the Circuit 300 ORANGE wire off the ignition switch. Circuit 300 only has power in RUN not in CRANK. Bodge wires into fuse slots, like your fuel pump hookup, cause fires.Remove the bodge wire from the CHOKE fuse and repair the damage caused to the PAK CON terminals.

Circuit 3 (PINK) from the ignition switch should stay powered in both RUN and CRANK. You're missing the IGN fuse... This fuse powers the points marked IGN on the 1984 fuse panel along with the HEI coil.
Properly plug the fuel pump into an open Circuit 3 IGN slot on the fuse panel... NOT THE IGN FUSE SLOT. These spots in the fuse panel are either female PAK CON terminals, just like the fuse slots, that you can plug MALE 1/4 disconnect into or Male 1/4 disconnect terminals that you can plug a Female 1/4 disconnect onto.

Incidentally. The Brake and some of the other warning lamps should light in CRANK. The ignition switch grounds Instrument Cluster Circuits 33 & 35 in that position only.
__________________
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.

Last edited by hatzie; 08-05-2019 at 12:45 AM.
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