Noah's95z28

iTrader: (7)

I have a 95 Z28 and the service engine soon light is on so I took it to the shop and they put it on the scanner and the code that came back was knock sensor wiring harness. Not the sensor itself. So today I crawled underneath and checked to make sure the plug was in correctly to the sensor and it was. I have the ground going to an oil pan bolt so I put a test light on it and it lite up when I put the clip side on the hot wire to the starter. That means its grounding correctly right?? Does anyone have a correct wiring diagram for that area or know for sure where that ground is supposed to go? I unhooked the battery to try and reset the comp but the ses light still comes on. Any ideas or suggestions would help. Thanks

ss.slp.ls1

iTrader: (36)

The power and ground to the start should have nothing to do with the knock sensor. I'm not sure, but I think that the knock sensor just grounds itself out to the block.

Noah's95z28

iTrader: (7)

Do you know where that ground is supposed to go??? Is the pan bolt correct?

ss.slp.ls1

iTrader: (36)

Probably not, but I'm sure that will suffice.

Noah's95z28

iTrader: (7)

So what would be throwing that code than? It says knock sensor wiring harness but do you think it could be the sensor itself??

ss.slp.ls1

iTrader: (36)

I would clean up the connector to the knock sensor and I would trace that wire all the way back to the computer and look for burns, rips, or corrosion. I'm not sure how to test it with a volt meter. Have you tried testing if for power with one clip on the connector and one clip to the block?

Noah's95z28

iTrader: (7)

No I have not. Is that done with a test light???

ss.slp.ls1

iTrader: (36)

Test light or volt meter. I don't know if that will work or what volts it should reat, but it's worth a shot. Maybe someone else can chime in.

Noah's95z28

iTrader: (7)

Anybody else have any ideas????????????

shbox

http://shbox.com/1/4th_gen_tech2.html#knock_sensor


The ground wire that is in the loom with the starter and knock sensor wires grounds to a lug on the block. Grounding it to an oil pan bolt should accomplish the same thing.

Noah's95z28

iTrader: (7)

Thank you for the diagram

jaywalkersw

As many times as I have personally used something from your page on top of the numerous times it gets referenced for diagnosing problems on this forum, it is an absolute wonder that a link to your page hasn't gotten a sticky yet. I say we need a sticky titled "if you need to know where _______ goes / attaches, check here first."

I don't know if this has been mentioned before, but if not I am surprised.

*I officially turn this thread back over to the OP, sorry for the hijack.