Tach questions revisited

[itsacrazyasian]

So i swapped in my diesel cluster this weekend. Had to do a little fiddling with some of the indicators and the alternator charge lead as after the gas to diesel cluster swap she wasn't charging. Anyway i just clipped the wire coming out of the factory harness and crimped a wire running out to the engine compartment going to pin 9 of the cluster which is the signal lead for the tach. Grounded one side of the tach sensor and ran the other to the cluster. I have tach function but only when i rev it. Its a brand new sensor from ford.


Any other ideas or is my wiring approach incorrect?

this is a 94 truck with a 93 cluster gas to diesel swap. factory gas had tach too.

 

[pt_Ranger_v8]

You should have to run both wires to the cluster. It's not a + and -, it's a sigPOS an sigNEG.

That's how mines ran, and it worked off the bat. I'll try and find the other pin it needs to go on.

 

[pt_Ranger_v8]

Ok, you should have one wire going to A9, and the other one going to A5 (might be yellow/white)

Hope this is what you need.

Sorry for the large picture

 

[Agnem]

I'm all too familiar with the 93/94 cluster issues. Your alternator wasn't charging, and also your air bag system is not up to ***** now either. Bet you didn't know that part. Much better option to find a 94 diesel cluster.

 

[pt_Ranger_v8]

I'm all too familiar with the 93/94 cluster issues. Your alternator wasn't charging, and also your air bag system is not up to ***** now either. Bet you didn't know that part. Much better option to find a 94 diesel cluster.

since I don't have an airbag, that doesn't concern me - what issues were there?

Of course, Ihave a 94 cluster - guess I was blessed .


On a different note - I don't have a 'cruise' indicator - something I never noticed in my 95 cluster. Did this era of vehicles even have a cruise indicator?

 

[itsacrazyasian]

My truck doens't have an airbag and the alt circuit is taken care of by a simple hot lead. Everything else works just fine though except the tach. Besides i got a really nice clean cluster and it only shows 44,262 miles on it vs my old one which has already been back to 300,000.

pt_ranger_V8 - alldatapro shows a completely different pinout for the tach, including one side to ground. but i guess i can try it out and see what happens.

 

[itsacrazyasian]

Ok, you should have one wire going to A9, and the other one going to A5 (might be yellow/white)

Hope this is what you need.

Sorry for the large picture

yellow/white (pin a5) is my fuel level.

 

[itsacrazyasian]

well for future reference in searches...

Attach one lead of the tach sensor to pin 9 white/pink on the brown connector of the diesel cluster. ground the other side of the tach sensor on a good engine ground.

my new tach sensor from ford was bad. I grabbed one out of my 6.9 with the cracked block and she works perfect.

 

[pt_Ranger_v8]

well for future reference in searches...

Attach one lead of the tach sensor to pin 9 white/pink on the brown connector of the diesel cluster. ground the other side of the tach sensor on a good engine ground.

my new tach sensor from ford was bad. I grabbed one out of my 6.9 with the cracked block and she works perfect.

gotta love them new in box mexican parts

 

[itsacrazyasian]

gotta love them new in box mexican parts

i wish....


Take a WAG where my tach sensor was made.

 

[pt_Ranger_v8]

Some place that starts with CHIN, and ends with A?


Goof grief

 

[itsacrazyasian]

Brazil.

 

[funnyman06]

I am having a similar issue with my new Tach sender. The tac idles around 200 rpms, but give it a little gas and it jumps up to 1000 rpms. Also when the glow plugs hit after a cold start the tach will go from like 800 rpms to 200 then back up after the plugs turn off. Its like current load on the alt plays a huge part? Help?