95 GMC Starter Solenoid Voltage

[cferry7]

1995 GMC Jimmy SLT 4WD

 

What could be the cause of low starter solenoid voltage / current ?

 

 

Starter often only wants to click sound with no crank.

Whille starting engine my solenoid voltage measures 8.64 v, 2nd time measured 8.42v.

Ignition wire harness has been replaced .

Suggestions . . / . . . appreciated.

[8.1HD/ALLISON]

Test battery. Check all connections. Check wiring for excessive resistance.

 

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[Duelin]

Also it could be the contacts on the ignition switch causing a high resistance.

[cferry7]

_{thanks for replies. Everybit helps .}

 

_{I have done continuity to / from battery to starter and starter case -- 0 ohms on diode scale.}

_{I have done voltage drop test across positive wire battery to starter -- 2.47 volts. Is the 2.47 volts while cranking turning engine over reasonable in this ~ 2- 1/2 footlong positive cable ?}

 

_{Yes - I have read with age the ignition key switch contacts grow in resistance . . .}

_{I remember maybe ?? ckeaning these when I put in the new ignition wire harness . Maybe.}

_{I think I'll re-vist ignition switch . . .}

[Duelin]

2.47 volt is high. It should be .5 volts or less. If you have a jumper cable run it from the battery positive post to the starter. Then do the test again and see what your voltage drop is. Also have you done a voltage drop test on the negative cable?

[cferry7]

Sorry, that was actually 0.247 volts; not 2.47 volts !

I'm going to trace the solenoid voltage problem later today.

If I remember the starter would turn engine everytime first time using my Remote Start cable/trigger ! Trying to get back on this.

[cferry7]

I have just found that resistance from Yellow ignition switch wire just beyond ignition switch to the Starter Solenoid terminal is 0.6 to 1.1 ohms. What I see is that park/neutral switch is in this path. I want to find the Park/Neutral switch ??? It is not at bottom of steering column as one manual states.

Where is it ?

[Duelin]

Look on the transmission.

[cferry7]

_{Checked Neutral Safety Switch - measures 0 ohms across switch - per Haynes manual - OK.}

_{Continuity check wires from Ignition to Neutral switch to Solenoid - 0 ohms -- OK.}

 

_{What is known as "hot wiring a vehicle" ?}

_{Now I am jumpering RED +12 v Hot wire to YELLOW Solenoid wire both in Ignition wiring harness to Start my SUV.}

_{Starting just about first time eveytime. Much better !}