1G Soldering Knock Sensor Pigtail

[marshall_308]

I am going to be replacing my knock sensor pigtail on my harness here soon. I have not had any trouble soldering all the other bad pigtails together but this knock sensor wire is different. Due to it having a shielding wire around one of the main wires I was wondering if I will get a bad connection/unknown problem... by just soldering it normally. So the question is has anyone done this just by normally soldering it together without any troubles?

 

[bryanwheat]

The shielding it the ground wire for the circuit. Strip the outer insulator off about an inch and a half and pull the shielding wire back and twist it together. Now strip the inner signal wire about a half an inch. From there solder the signal wires together and tape or heat shrink. From there solder the shielding wire to the ground side of the plug and than tape or heat shrink that.

 

[NHerron]

Hey Bryan, are you saying to solder the loose braid wire to the ground wire of knock sensor, pin 2 BW wire?

I had wondered doing that a while ago, just wanted to get some more insight to this

And the shielding (like knock sensor and 02 sensor) all goes to the ECU area crimped together I remember that but, do they all meet at the ECU sensor ground pin? Thanks

 

[marshall_308]

This is a 1g dsm btw. I think the 2g setup is a lil different

 

[bryanwheat]

Yes, the shielding is the ground.

 

[NHerron]

If **shielding is the ground** then why isn't the end of the shielding soldered to the BW wire to begin with?

So you can solder the loose shield braid wire to the ground wire of knock sensor, (pin 2 BW wire)?

Clarifying since it's not how OEM was made...thanks again B

 

[DSM1G90]

Didnt the KS have the plug on the end of it, or did it rip off and you're hard wiring it to the harness?

Can do wire nuts...

 

[bryanwheat]

If **shielding is the ground** then why isn't the end of the shielding soldered to the BW wire to begin with?

So you can solder the loose shield braid wire to the ground wire of knock sensor, (pin 2 BW wire)?

Clarifying since it's not how OEM was made...thanks again B

On the engine harness the shielding is the ground from the factory. There is only 1 wire in the harness, and it is wrapped with the shielding. Without hooking the ground to the shielding there is nothing else to attach the sensor ground to. Ive reattached quite a few of these and that is how it always is.

 

[NHerron]

On my 2G the knock sensor has two wires. The engine harness has 2 wires and then some bare shielding swirls around the two wires. When I first got the car one of the two wires was completely cut actually and that's when I encountered the idea of soldering the shielding to one of the two wires. Would that be a good or bad idea, is what I'm wondering. I thought 1G's would be the same?

 

[marshall_308]

Didnt the KS have the plug on the end of it, or did it rip off and you're hard wiring it to the harness?

Can do wire nuts...[/QUOTE

No the knock sensor plug is not there, it was ripped off some how by the guy I bought the harness from here on the forum. And yes I am wanting to hard wire it with solder not a wire nut.

 

[NHerron]

Don't get rid of the harness side connector completely, in case you ever replace with a new knock with a real connector. Just cut some insulation off the wires and then strip the sensors wires back and solder away! Electrical tape, heat shrink, whatever

 

[marshall_308]

Don't get rid of the harness side connector completely, in case you ever replace with a new knock with a real connector. Just cut some insulation off the wires and then strip the sensors wires back and solder away! Electrical tape, heat shrink, whatever

I already have a used knock sensor pigtail bought just have to solder it up to the harness and plug in my new knock senor. I was just curious if I had to do anything special with that shielding wire or not. So probably will just solder the main wire together heat shrink it and call it a day. Hopefully I won't have any problems with a bad reading or anything from that sensor.

 

[NHerron]

Nope your fine. The bare braid wire just swirls around the two main wires and ends it's journey near the connector. The opposite end of that braid gets grounded near the ECU

 

[marshall_308]

Finally got the car up and running......i did a log with link and seems to be a problem with the knock sensor. I'm getting a lot of knock when im over 2.8k rpm and thinking it has something to do with this rewiring. I get a spike of 9 counts of knock then 3.2 from there on out. My diagnostic trouble codes are knock sensor circuit malfunction and it's a newer knock sensor so. Any help would be appreciated.

 

[Colt4G63 also]

If you have that code, then either your sensor is screwed up, or the wires that lead to it. I would check that.