LS7 Speedo cable wiring problem - Please help?
Discussion
I am desperately hoping someone can help me here as I am not able to get the info from the original engine supplier thus far!
I have a new LS7 ( well-2007!) which has a slightly modified loom to fit my project. The ECU is a standard GM type.
One of the loom tails is a two wire (yellow & purple) extension & plug that is labelled 'Speedo'. This 'speedo' cable is I understand to be linked to a sensor monitoring a toothed plate set between the driveshaft and Gearbox, thus supplying a signal to the ECU telling it if the car is in motion.
The problem I face is that I appear to have a 'Dakota Digital' sensor (3 wire black signal, blue gnd, and brown +12v), but the loom speedo wiring is yellow and purple, so I have no idea which connects to which.
Finally, I had someone tell me that they thought the sensor should be a magnetic sensor (two wire), not a hall efect sensor (three wire) ......and so I am totally confused!
Can anyone tell me:
a) what is the correct sensor type for this application
b) what the yellow and purple wires should be matched to - or how I can tell?
Any help would be gratefully received as the project is stalled until I can sort this!
Thanks in advance
Keith
I have a new LS7 ( well-2007!) which has a slightly modified loom to fit my project. The ECU is a standard GM type.
One of the loom tails is a two wire (yellow & purple) extension & plug that is labelled 'Speedo'. This 'speedo' cable is I understand to be linked to a sensor monitoring a toothed plate set between the driveshaft and Gearbox, thus supplying a signal to the ECU telling it if the car is in motion.
The problem I face is that I appear to have a 'Dakota Digital' sensor (3 wire black signal, blue gnd, and brown +12v), but the loom speedo wiring is yellow and purple, so I have no idea which connects to which.
Finally, I had someone tell me that they thought the sensor should be a magnetic sensor (two wire), not a hall efect sensor (three wire) ......and so I am totally confused!
Can anyone tell me:
a) what is the correct sensor type for this application
b) what the yellow and purple wires should be matched to - or how I can tell?
Any help would be gratefully received as the project is stalled until I can sort this!
Thanks in advance
Keith
Hi, have a search over on http://www.ls1tech.com/forums/. I'm sure you will find your answer there. Just in case you don't, I'm using a Dakota digital converter on my LS1 conversion so I might be able to find you some pointers. Keep me posted.
It is a SEN 1019 sensor as supplied by JS with my LS7!
A 3 wire unit - hall effect so Dakota tell me! - but this is not going to a guage... this is, it seems, to be spliced into the main LS7 GM ECU engine loom (yellow - high ref signal, and purple - low ref gnd)... And thus my confusion...
The HE sensor is - BLUE is ground, TAN is 12v power, BLACK is signal.
On the harness - PURPLE is low ref (ground) , YELLOW is high ref (signal).
So what goes where? - This is further confused by someone suggesting it should be a simple magnetic sensor? DOHHH! Now I am confused!
cheers
Keith
A 3 wire unit - hall effect so Dakota tell me! - but this is not going to a guage... this is, it seems, to be spliced into the main LS7 GM ECU engine loom (yellow - high ref signal, and purple - low ref gnd)... And thus my confusion...
The HE sensor is - BLUE is ground, TAN is 12v power, BLACK is signal.
On the harness - PURPLE is low ref (ground) , YELLOW is high ref (signal).
So what goes where? - This is further confused by someone suggesting it should be a simple magnetic sensor? DOHHH! Now I am confused!
cheers
Keith
Edited by V8 Vum on Monday 16th August 10:10
Gassing Station | Engines & Drivetrain | Top of Page | What's New | My Stuff