Speedometer dying

[CGauthier]

Yet another question for you guys, my speedo has been workin intermittently lately, today I dont think it worked at all. You guys know of any trouble spots that i should check first ? Finding it a little hard to keep track of my MPG lol



TIA

Carl G

 

[MRickard]

Check the spedo's connection at the transfercase - may be "barely on"

 

[dan brooks]

Mine was acting up a while back. Cleaned the connections with electrical cleaner and used some dilectic (sp?) grease - haven't had a problem since. Hopefully yours will be as simple and cheap.

 

[dpuckett]

Check:

-Truck end of the pigtail- make sure the female end has round holes. If they are not perfectly round, it wil reak havoc on the speedo.

-Pin going from the adaptor into the transmission adaptor is square. They get rounded with age, and again cause problems.

-drive gear in transmission, and driven gear on the part that goes into the transmission that the adaptor box or VSS hooks to.

-my post last week on this very subject; I went into greater detail. I am kind of winding down and not real talkative just now.

Daniel

 

[CGauthier]

Thanks for the replies everyone... . got some ammo to throw at the speedo now. If we all go to the 1st gen day I will repay you guys with beers, i've become ALOT more knowledgeable of my truck thanks to you guys. Anyways I'm thinking it's an electrical problem because it either works perfect or it doesn't work at all... . I'll get to the bottom of it... would be nice if my service manual would ever come in They said 6 weeks and it's been 3 months

P. S. DP, for not being very talkative you still do a good job of answering the questions lol... How long you owned a CTD?

 

[MRickard]

Cleaned the connections with electrical cleaner and used some dilectic (sp?) grease

Dielectric grease? That is non-conductive. Usually you want to use a conductive grease (has powdered metal in the grease for conductivity). You could use dielctric grease if you could not get to something to insulate it and keep it unxeposed to the environment though.

 

[Paychk]

Originally posted by MRickard

Dielectric grease? That is non-conductive. Usually you want to use a conductive grease (has powdered metal in the grease for conductivity). You could use dielctric grease if you could not get to something to insulate it and keep it unxeposed to the environment though.

If you use a conductive grease on electrical connectors, what prevents the pins from shorting to each other?

 

[MRickard]

Distance between them. You definately do not want to use a dielectric grease as an insulater. The part you want to protect is the contact areas of the two media - which needs to conduct electricty. That is where the grease goes, not connecting everything together causeing a (small) short. Dielectric lubes are in transformers and such that cover everything (cooling in that case), or perhaps you could use it on the outside of connectors to keep them covered - but that does not really matter - it is the contact area.

 

[Paychk]

The reason I ask, is because this is required practice on USAF aircraft connectors. Dielectric or some call it silicone grease is use to seal out moisture and corrosion. Also it is becoming a require practice on automotive applications.

 

[Philip]

Check the wires going to the speed sensor also. My speedo went out today. I found some wires rubbed threw up by the shift linkage area.



With the age of our trucks most of the covering on the wires are gone now. After I did the repair I reran the wires in some unversal wire loom I got from NAPA.

 

[MRickard]

If you have a bunch of connections in a small area it is best to use non-conductive grease, otherwise it is best to use the conductive grease as it makes a better bond by crushing the small pieces of metal between the two contacts, and filling in small pits, than not using it, even w/o corosion/moisture probs. I take it you had a lot of connections that were too close to use conductive grease in aircraft.



--Thanks for the insite though - never thought about it that much before Remember that I am the newbie around here too. heh heh

 

[MrWinkey]

I never used conductive grease... ... and in my FSM's for my dodge cars it always says to use dialectic grease.



I just bought a new sensor. 50 bucks from napa and it works like crap.



It bounced the whole 1st day I had it and now it seems to of settled down but still bounces every once in a while.



Guess that's what I get for when it's made in that "T" country.



Anybody know if mopar has some decent ones?

 

[Paychk]

Which sensor are you looking for, the VSS? for a D350?



This place wants $35. 41, don't know if they have them in stock, but you could call them & check.



http://www.trademotion.com/partloca...62094&make=8&model=D350&year=1993&catalogid=1