Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
If the starter relay is clicking then voltage is making it from the battery, fuse, ignition switch and through the neutral switch or clutch switch to the relay. So, if it's all good, then the problem has got to be the relay.
My manual doesn't show which pins in the relay are 30 and 87, can you tell me what are? the color of the wires or what fuse powers these pins?
Can you put your hand on it and turn the key to start or have someone lese turn the key to start and make sure it's the starter relay that is clicking?
If it's not, check the fuses IGN E, Crank and IGN B in the under hood fuse block. To make sure, remove that starter relay and test the pins for voltage in the socket. One should be hot all the time, that is the one from the battery and fuse IGN A. Then when you turn the key to start an additional should be hot, that is from the ignition switch, through the neutral/clutch switch and the IGN E and B fuses.
Just to make sure you have the correct relay, here is a diagram.
And here is the wiring diagram,
And hopefully this explains the pin numbers
No, actually that last diagram is wrong. I don't have one, sorry. that was for a 2003 Sierra.
Once is no good. remove the relay and test again in the socket. First find out which pin in the socket should be hot with the key on start. The second one to be hot, not the one hot all the time, then turn the key to start 20 times. That pin should be hot all 20 times. If not, it's a loose connection or bad ignition switch or bad neutral switch. so move the voltmeter or 12 volt test light back to the next connection and test again 20 times with the key on start. You might even want to check at each of those fuses 20 times in a row with the key on start. Don't forget the crank fuse also.
Checkr? What does that mean?
I don't know what pins numbers are for what. I told you that already.
Plus, 8 volts on any of those is wrong.
Did you have the relay removed when checking these voltages? If so, I don't know why you have 8 volts on 2 pins, plus the 12 volts on the pin 30. There should only be 2 pins hot, one hot all the time and then 1 hot with the key on start.
Yes, voltage to one pin should be zero with key off and then 12 volts with key on start.
Is that pinout I sent you earlier correct?
How many volts do you have at the IGN E fuse with the key off and key on start?
If that's true pins 85 and 87 should never have any voltage when the relay is out, no matter if the key is on or not.
Only pin 30 should be hot all the time and then pin 86 hot with the key on start and both should be 12 volts, not 8 volts.
I will assume the .04 is an error with the digital meter. I get those kinda readings sometimes, too. I know it's supposed to be 0.00. Anyhow, if that IGN E fuse has 12 volts and there is only 8 at pin 86 with the key on start, then you have a short circuit in that pink or dark green wire. Either before or after the neutral/clutch switch or possibly the switch is bad. By the way, you never did say which it is, an automatic or manual trans?
I still cannot understand how pin 87 could have 8 volts though.
Could you double-check that pin 87 with the relay out, key off and key on start. Cause if I has voltage a all with the relay out, then there also appears to be a short circuit with the pcm.
How much voltage does 87 have when the key is on and what is the key on, run or start?
What does "Fuuuued" mean?
Are you testing from a cellphone? Does the spell checker not work or something. Often you are typing things that I cannot understand.
Ok, that isn't what you said before, "Customer Checked all and power on pins 30 12 volts 86 8 volts 87 8 volts 85 0 volts these are with key off Key on start no change 23 Aug 2015, 11:46 am"
Now correct me if I'm wrong, didn't that say "87 8 volts"?
Plus, I meant texting from a cell phone? I see spell check doesn't always work on my side either.
Ok, let's just forget pin 87 then. Pin 86 should have 12 volts.
With key on start of course. That is probably why it's not working.
So, give me the results when you get them of the voltage in and out of the neutral switch, the pink wire in and dark green out with the key on start. Leave the relay out so the engine won't start.
You are doing something wrong then. Was the key on start? And it's dark green not green.
Actually I see those wires can be hot with the key on run also.
Anyhow, didn't you say earlier that pin 86 had 8 volts? That is fed from that dark green wire.
If you get zero volts now from the dark green wire, then you are probably not in park or neutral or the switch needs adjusted if there is an adjustment or the switch is bad. Anyhow, you don't have to keep turning the key to start, just run is ok when testing that dark green wire. If it's still zero move the shifter from park to low and back and forth a few times while seeing if at any spot there is voltage on that dark green wire. If so and it's not when the shifter is in park and/or neutral then the neutral switch needs adjusted or is bad.
The neutral switch is bad, replace it.
Here are the instructions,
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I'm going out to work on my car now.