shark

Forgot to add, did try jumping battery with cables and also
tried direct hookup from another vehicle battery to truck
starter thus bypassing trucks battery which has not yet been
load tested.

whitelightning

You sure go about it the hard way. First thing to check is cables for
clean and tight followed by load test on battery followed by starter.
If the selinoid was clicking it was telling you the ignition switch
was working just fine. More than likely the issue is with the
starter, ditch the damn gear reduction and go for the large body
striaght drive.

Whitelightning

cbrooks

Ouch! Anyway, it isn't my truck and so it's the blind leading
the blind. He, truck owner, told me it was the starter. I took
his word for it. Turns out it was never the starter. Ran it
twice at AutoZone & passed. Have to do a battery load check
tomorrow. Fuse-able alternator links don't usually go bad do they?

Does the 1990 S10 have headlight & horn relays? Neither are now
working and fuses are OK. Dome light is now out too.

shark

Battery loaded tested as new. The cables, one apparently was
pinched somehow, yet looked like brand new. It had continuity
but evidently couldn't carry the load. So that cable was
replaced and the engine does now crank but still doesn't start.
No fuel making it to the engine.

Also, there is still the problem of no juice getting into the
fuse box in certain areas as tested with a test light. The
headlights, the dash lights, the cab roof courtesy light, the
clock, the horn still do not work. The blower, the turn signals,
the 4-way, work. The radio sounds like it's getting power but
cannot hear anything coherent.

The fuel relay is OK. Am still wondering where the fusible links
are? There is one insulator block mounted to the firewall and
has one joined pair of wires fixed to it and which is sealed in
plastic. This joined wire is getting juice as test light shows.
The are two wires other going to the alternator which have ~1/2"
round plastic cylinders which I am assuming are inline fuses.
One has been checked for continuity and appears OK. Have not
tested the other one yet. If there are fusible links somewhere
else on his truck, I do not know where they could be, other than
the one on the firewall. Anyone know for sure where all these
fusible wire fuses are on a 1990 Extended Cab S10?

steve w.

Those sections you think are inline fuses are the connector crimps for
the fusible links. The links are the wires from the alternator to those
connections. You said the starter was replaced? Check it to make sure
the wiring was all connected properly. There is at least one internal
power feed on there along with the battery cable.

Sounds like it didn't get connected up.

--
Steve W.
Near Cooperstown, New York


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shark

OK. Turned out the one fusible link, which I've never known
about prior to now, was indeed the culprit. In addition to a
bad, almost new, positive cable that got somewhat pinched which
prevented enough juice to crank over his truck engine, his truck
is now running fine. It starts much easier and seems almost like
a wholly different truck. Thank you to Whitelightning, you're
the guru of this newsgroup. The truck owner is somewhat happier
than he was, yet still grumbling away(it's his nature). Anyway,
I learned a lot.