tachometer comes and goes

[achampagne]

I changed out my water pump a couple of weeks ago, and since then my tach comes and goes. Does anyone have a clue what could be causing it and the water pump might have had anything to do with it? I don't see where the two could be related but the timing is there. Any help would be great guys thanks.

 

[cosmic88]

Alternator

You could very well have disturbed a wire on the alt. check all those connections.

A bad alt. or connection causes the tach to fail on these rigs.

 

[achampagne]

Well I coolant was everywhere, I guess I'll clean all the connections and see what happens. Thanks

 

[MattScott]

If coolant was everywhere its possible that it is corrosion. More times then not this mean the alternator is on its way out.

 

[achampagne]

Now the speedo is acting up and not moving, so I went ahead and made a call and I'm picking up a used alt in the morning.

 

[Viggen]

Alternator

 

[achampagne]

Just finished swapping alts, now I have a whine and same issue. I think the old alt killed my new battery, going to test it now.

 

[achampagne]

New battery, installed and same issue

 

[achampagne]

Ok so with the old crappy battery I had a whine but had the tach working, with new batt there's no whine but no tach? I'm perplexed!

 

[David Harris]

Ok so with the old crappy battery I had a whine but had the tach working, with new batt there's no whine but no tach? I'm perplexed!

Nothing to do with the battery itself. Loose connection somewhere.

David

 

[achampagne]

I have rechecked the connections on the alt twice and added some electrical grease, I will re recheck the batt connections even though they looked good, anywhere else I should check?

 

[achampagne]

I think I have my belt routed wrong and this is causing my issue

 

[cosmic88]

lol...that'll do it too. the squeel makes sense now. you have the diagram for the route?

 

[achampagne]

All fixed! I rerouted the belt the ways its supposed to go

 

[David Harris]

When I got my first Disco, I thought I had a bad alternator. I took it to the shop to have it tested and they said it was 100%. Went back and found out that the belt had been routed wrongly by the previous owner. Very easy to do on these. Problem solved.

David