5" tach acting up.....what could it be

Roland69

Sergeant Tangnet

Sep 17, 2005

2,867

2

58

Port Elgin, Ontario

Aug 2, 2006

#1

• Aug 2, 2006

• #1

I was driving tonight and my new (2 months old maby) tach started jumping all over the place like it went from 2-4K then pegged itself to past the 10K and then back down. It acted really random. I unpluged the red power wire from the fuse pannel while driving so it didn't catch fire or something lol.. Could it be because I grounded it to the thin brace under the steering coloumn with a small self tapping screw.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

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Aug 2, 2006

#2

• Aug 2, 2006

• #2

I'd check your signal wire hook-up at the coil.

Checking the gauge ground is worthwhile but unless it's horrible, I doubt it's the issue.

Good luck bud.

 

Roland69

Sergeant Tangnet

Sep 17, 2005

2,867

2

58

Port Elgin, Ontario

Aug 2, 2006

#3

• Aug 2, 2006

• #3

all I did was splice the green wire from the tach to the green with on the coil harness and wraped tape around it. I'll check that first.

 

stangjunkie

New Member

Nov 15, 2004

381

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0

Aug 2, 2006

#4

• Aug 2, 2006

• #4

sounds like a weak point to me...

 

Roland69

Sergeant Tangnet

Sep 17, 2005

2,867

2

58

Port Elgin, Ontario

Aug 2, 2006

#5

• Aug 2, 2006

• #5

how should I splice it in properly.

 

Roland69

Sergeant Tangnet

Sep 17, 2005

2,867

2

58

Port Elgin, Ontario

Aug 3, 2006

#6

• Aug 3, 2006

• #6

I pluged the red wire back in today and it works fine....But I will still clean the connection up at the coul and maby change the ground to a better spot.

 

Mavrick

Founding Member

Aug 29, 2002

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46

Collingwood, ON

Aug 3, 2006

#7

• Aug 3, 2006

• #7

You should be using butt connectors or soldering your connections. When you just twist wires together and tape them up, they like to get loose and faulty.. even corrode and come apart over time.

I'd recommend butt connectors.. they work great and don't require any tape or solder or anything.

Like these.. but you'll want the blue ones for 18gauge

 

Roland69

Sergeant Tangnet

Sep 17, 2005

2,867

2

58

Port Elgin, Ontario

Aug 3, 2006

#8

• Aug 3, 2006

• #8

but I need to splice into the factory tach wire like a T

 

Mavrick

Founding Member

Aug 29, 2002

2,264

0

46

Collingwood, ON

Aug 3, 2006

#9

• Aug 3, 2006

• #9

I'd solder it, or run a length of 16g wire straight to your tach from the coil itself.

 

Roland69

Sergeant Tangnet

Sep 17, 2005

2,867

2

58

Port Elgin, Ontario

Aug 3, 2006

#10

• Aug 3, 2006

• #10

where on the coil...that is what I wanted to do in the first place but I searched and found that everyone was splicing into the same wire I did

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

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Aug 3, 2006

#11

• Aug 3, 2006

• #11

The negative side of the coil - it sounds like that's where yours is. I'd just make sure the connection is good.

If hosing with the power wire made it work again, just check the connections to make sure they're good. Should take a minute. Given the issue, I doubt you'll know when you fixed it.

Good luck.

 

Roland69

Sergeant Tangnet

Sep 17, 2005

2,867

2

58

Port Elgin, Ontario

Aug 3, 2006

#12

• Aug 3, 2006

• #12

my tack wire (green) is spliced into the green with yellow stripe off the coil harness.....should it be somewhere else

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

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Aug 3, 2006

#13

• Aug 3, 2006

• #13

Roland69 said:

my tack wire (green) is spliced into the green with yellow stripe off the coil harness.....should it be somewhere else

Click to expand...

I don't remember colors but that sounds right. If you were on the wrong wire, you'd know it. Some harness connectors have a little + and - on the connector.

Good luck trackin it down bud.