2002 tach signal wire

Reply Subscribe

Thread Tools

Search this Thread

Aug 16, 2010 | 09:35 PM

cjg454ss

Thread Starter

Banned

iTrader: (27)

Joined: Jan 2006

Posts: 1,205

Likes: 0

2002 tach signal wire

I have a 2002 camaro running bs3. i have the computer in it still runing the guages. my tach does not work. I had a custom harness made with a crank signal plug for the tach. I plugged it in and it didnt work. I run an crank trigger for the bs3. Anyone know which wire is the signal. i have a green, blue with white stripe and yellow with black stripe. My crank trigger has two wires.

Any help would be appreciated.

Aug 16, 2010 | 11:43 PM

Frost

FormerVendor

iTrader: (45)

Joined: Jul 2005

Posts: 5,913

Likes: 2

From: Richmond VA

The dash tach needs the cam sensor signal.

Aug 17, 2010 | 06:26 AM

cjg454ss

Thread Starter

Banned

iTrader: (27)

Joined: Jan 2006

Posts: 1,205

Likes: 0

Quote:

Originally Posted by Frost

The dash tach needs the cam sensor signal.

dang i thought so. everyone said crank. which wire is the signal wire.?

Aug 17, 2010 | 08:05 AM

Frost

FormerVendor

iTrader: (45)

Joined: Jul 2005

Posts: 5,913

Likes: 2

From: Richmond VA

I don't have it in front of me but will shortly....

The PCM uses the crank signal for it's internal RPM calcs, but the dash tach is all cam sensor.

Aug 17, 2010 | 01:17 PM

cjg454ss

Thread Starter

Banned

iTrader: (27)

Joined: Jan 2006

Posts: 1,205

Likes: 0

k thanks, let me know when you know what wire. i stil cant find anything on it/.

Aug 17, 2010 | 02:19 PM

Frost

FormerVendor

iTrader: (45)

Joined: Jul 2005

Posts: 5,913

Likes: 2

From: Richmond VA

61 PNK/BLK 632 Low Reference (Camshaft Position Sensor)
73 BRN/WHT 633 CMP Sensor Signal

I *think* this is the +12 ref
39 ORN 631 12 Volt Reference

This info is in stickies on this site as well

Aug 17, 2010 | 08:27 PM

cjg454ss

Thread Starter

Banned

iTrader: (27)

Joined: Jan 2006

Posts: 1,205

Likes: 0

i wired it up correctly and got nothing. i connected a to a, b to b and c to c. The wire colors were different than you stated frost but i do have a custom harness. who was the member that redid the stock 2002 tachs to work with bs3 on here with 1 wire like the 98?