Question edited for funky spelling and punctuation.
Question moved to model category.
Jeff provides a great answer to the issue
Jeff Armer Jan 02, 2023. Starter relay contacts stuck closed could be a reason .
Circuit Description
Moving the ignition switch to the START position sends a 12 volt signal to the engine control module (ECM)/powertrain control module (PCM) Crank Request circuit. The ECM/PCM verifies that the transmission is in the PARK or NEUTRAL position. With the transmission in Park, voltage flows through the Park/Neutral position switch and feeds the starter relay coil. The ECM/PCM then grounds the control circuit of the starter relay. When the starter relay is energized it allows battery positive voltage to the starter solenoid S terminal. On some vehicles the starter will continue to crank the engine with the key released until it starts or the crank command has timed out to prevent excessive heat build up in the starter circuitry or the ECM/PCM receives an engine run flag.
Il est possible de trouver un sch?ma de c?blage pour la radio d'usine GMC Arcadia AWD 2010 aupr?s d'un concessionnaire GMC ou un atelier de r?paration automobile agr??, ils ont acc?s aux manuels techniques et aux informations de c?blage pour les v?hicules GMC. Il est important de noter que les travaux de c?blage de l'?lectronique de voiture doivent ?tre effectu?s par des professionnels exp?riment?s, car une mauvaise manipulation peut causer des dommages au v?hicule et mettre en danger les passagers.
Your system is pretty basic and easy to troubleshoot. The coil only has 2 connectors. Battery + and the ground signal that comes from the distributor. The + lead should have 12v battery power when the key is turned on and the other wire should get a pulsing ground signal when the engine is turned over. You can test the system with a 12v test light. If you ground the clip end and probe the + wire the light should light bright anytime the key is on and if you clip the light to 12v + and probe the signal wire while the engine is cranking, the light should pulse.
You have one flasher for your turn signals and one for your emergency flashers. If one turn signal works then it isn't your flasher. I would look at the connector under the bed where the trailer plug splits off. This is a common place for corrosion. With a 12v test light you can probe from the light for power. If there isn't anything at the connector at the light move up to the splitter. If you have a signal there your problem is between it and the tail light.
C1500 pickup/
that was done backward, pump first? and bath in fuel.
the order is,
engine , spark and last fuel
are those spark plugs 27 years old,?
can not burn fuel with spark dead. test them all we do. spark tests
same goes on dead engines (mech)
we check engine compression first, 150PSI up and equal x8
then spark x8
IMMO fitted cars the IMMO lamp must not be glowing wrong.
then fuel tests
and air tests (you said added air is no cure , good test that)
means ISC dead , no air to start.
thanks that make any engine seem bad and is not really .
EGR stuck open
huge vacuum leaks (if maf based EFI)
CATS melted blocking exhaust and engine can not pump air
a vacuum test (cracking levels) proves cats not melted.
ISC valve stuck closed no idle air.
use the scan told more correctly?
1; connect up tool.
2: key on scan (nothing you said)
3:crank for 5 seconds.
4: release key (NOT OFF)
5: scan again, give a few minutes to roll out DTC'S if not push the pending DTC button, see them. roll out. using a real scan tool.
not a $13 lame code only reader.
ok still dead
remove fuel pump fuse or relay. (we are expecting flooded engine)
crank for 5 seconds to clear the flood at WOT wide open throttle.
then try in this state now, spray starter fluid, to induction.
3 seconds spray ,get 3seonds run time. repeat 3 times listen for engine damage. Noise.
last and not the least
cap and rotor and wires sets are no good, 27 years old ever
assuming me above battery charger keeps it charged
assumes Distributor not lost time. pulled and put back wrong. as vast folks do, all the time.
not told when it last ran perfectly (never seen it or?)
fuses good< oops
scan the PCM see errors cranking OMG it tells you why:? sure can.
forgot the 6 new spark wire plug set, replaced 1 by one never all at once, 6 new OEM type spark plugs and gaped correctly
22 year old spark parts are no good ever.
test for spark on all 6 yet, spark is 1st or there can be no FIRE.
4.3L cranks but will not start and run and stay running.(problem1)
fire cant be seen, but spark can.
1,2,3 engine,spark, fuel good 1,2,3 in that order
spark and fuel can not run a dead engine, so 1 is first engine'
compression good 150psi up not lower, all near same
next is spark if EFI sees spark
actual fuel pressure not told just OKay. pressures matter big time in EFI, and at cranking for sure. then idle and WOT later.
engine is free running so all tests are safe, cranking too.
the service manual covers all fuel checks cranked, balance test and leak down tests.
watch scotty
https://youtu.be/064Ilsz8Fzg
Probably too much unregulated power from the jump box. Get your digital multimeter and test the voltage off car and jump it to the multimeter.
I live in the Great White North (Canada) and a trickle charger and a block heater are essential. I just had my block heater on for 4 days as the temperature was -15'C or - 23' with wind chill. They are only 125 watts.
There are some videos that may help, but the easiest thing is to get the vehicle to an auto electrician. His pro grade scan tool computer will show what the fault is.
scan the ECT if it reads wrong most time the 17 year old thermostat is bad. stuck open, missing or those crazy fail safe stat gone wild.
ect 180 to 200f is normal .
if not thermostat is first. I used and IR gun to measure the stat hosing to see if its bad, 1minutes work,
most times the gauge never fails so we do 1simple test to prove that.
scan the PCM is first.
never seen a STaT good 17 year old,
had one that told near all day to hit 180f>?
when old that do nasty things, even stick closed and warp HEADS
why risk that, attack the stat.
