Why YOU Should Install a TACH

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[@decentgarage]

New baby arrived this week! Also added a new baby to the 1st gen family, any guesses?

[@OldCowboy450]

Installed a tach. using the Geno's steering column mount and the prefab wiring harness you used, easy install and it works as it should. Thank You. Great video!

[@K_Kupisch]

Where did you get the wiring harness?

[@ronsre-creations5289]

Nice tutorial Tim, looks sharp in the OG ! Nice upgrade to have a tach.

[@decentgarage]

Thanks Ron!

[@OldCowboy450]

Found the harness on E-bay, fast delivery easy install, works great!

[@jtuzil]

Awesome. This is on the project list. have you run into any speedometer issues? I have replaced the sending unit on the trans and got no love. I've seen some tutorials on repairing the factory speedo but was considering aftermarket. Thoughts?

[@OvensGarage]

Great vid Tim! Too bad they aren't making the classic style tach's anymore. Congrats on the new baby. Don't know how you do the vids with such a big family. Cheers.

[@decentgarage]

Haha thanks Tyler!

[@mutantryeff]

I built a center console for all my gauges. I think I sent a photo to your e-mail address this past week that would have included the console.

[@decentgarage]

I must have missed the email! I'll go check again. I'd be interested in seeing that

[@KellyCruse-io4un]

I have a 1st gen, 1st gen! My Dad ordered this truck new in 1989, built in December 1989 , the truck is immaculate for the year and all and mostly original. Only thing not original is upgraded fuel pump and injection pump tuning. VE pump,12 valve are not even close to excactly the same, there are suddenle and drastic changes sometimes. I am struggling to find parts and support for this year model. A!C hoses, especially the hoses with the capillary tube! The rest is available, the Dodge Dealer where it was bought from originally can’t find or get the parts either. I’ve searched everywhere I know how. Any help would be greatly appreciated and from any followers of this channel. Thank you for your help and support on your videos on our old dinosaurs!

[@IronHorseGarage]

Awesome stuff sir, good info!!!!

[@decentgarage]

Thanks man!

[@jimmungai1938]

Oh this is six and a row jim commenting about the wiper blades like I said they’re the best I’ve ever had

[@decentgarage]

I love them too!

[@jimmungai1938]

Gino’s garage has always been helpful to me too I just installed a set of wiper blades from those guys best wiper blades I ever had..

[@decentgarage]

I love their wiper blades as well!

[@draco2202]

Hey I’m currently about to do this to my truck I can’t figure out how to get the old housing off, and it feels like I may break it I posted in the 1st gen cummins page and am waiting to see if anyone has any tips but figured I’d ask here too. How do you actually get the old housing off without breaking it

[@grw707]

Tim, I looked on Amazon for the auto meter single gauge steering column plastic mold. But all the reviews said that the part did NOT come with mounting holes to match the stock bottom plastic. Hope that’s not too confusing… was this your experience??

[@decentgarage]

Go to Geno's garage and order it. They'll get you set up

[@mikestrucks]

Nice one Tim 👍🏻

[@decentgarage]

Thanks Mike

[@10mm]

Nice! I have the same setup

[@decentgarage]

I really like it. Towed another truck home yesterday and it was nice to be able to see the rpms while towing

[@jimmungai1938]

Nice job put it together only problem is like I got a 3800 RPM governor spring and only goes to 3000 it’s a six in a row jim

[@decentgarage]

The higher rpm give spring is actually more important in its ability to improve throttle response. I would guess you'll rarely get over 3k rpms

[@TheRustyGarageandHomestead]

Jim mungai Isspro sells a 4000 tach as well

[@jond1536]

So this is for a 91.5-93 years. the pre 91.5 you need to either use a reader on the crank pulley or a Alternator drive tach. he must have an ECM to have that plug. Correct me if I am wrong? Great videos

[@decentgarage]

Yes this only works for 92 and 93. I don't think the 91.5 has this plug but i could be mistaken. And you are correct on the other options for non ECM trucks

[@559skatercrew]

Did y’all ever find if the 91.5 has the plug under dash?

[@harveyr2546]

I have a 1986 dodge ramcharger. Needs alot of TLC. Need a wiring harness for the engine bay. Thought about trying to make my own. Any tips on where to get a wiring harness ??

[@decentgarage]

If your harness is too far gone the best way to go is a painless wiring harness

[@Tyler-gg6ls]

Great video! Looking to install a tach on my 92 first gen! Is there any kind of link you could provide for the one you installed? Thanks!

[@decentgarage]

You can find them at the hungry diesel or Geno's garage. You can use the code decent1stgen for 10% off any order at the hungry diesel 👍

[@CoeCasun]

I've been looking at doing this and you used a separate ground wire but couldn't you just jumper from where the black (DC ground) wire lands to where it shows to connect to lamp ground?

[@decentgarage]

I think you could do that. My tendency with grounds though is to go over kill. Seems like most electrical issues with these trucks boil down to grounds

[@CoeCasun]

Thanks for the response! Better safe than sorry I suppose

[@OldCowboy450]

Did the install looks great and it works. I think I have it calibrated correctly, can you help with the Minimum and Maximum RPM's for a 1993 5.9 12 valve, looked in all my books can't find that info.? Great Vid's!

[@decentgarage]

Max rpm is going to depend on your timing, gov spring, and cam. Stock truck will not get over 2200 rpm or so

[@OldCowboy450]

@@decentgarage And it should idle around 700?

[@decentgarage]

@@OldCowboy450 an auto should idle around 700 in gear with the AC on.

[@jasontruman1215]

I have an old banks tach…. It is literally a relabeled isspro even says isspro on the back.

[@decentgarage]

I would love to find a set of the original banks gauges

[@ebeegeebeefofeebee3181]

Since the arrival of the new baby I noticed you have developed super human speed..

[@decentgarage]

Lol that comes with the territory 😂

[@off-roadtv5936]

Anything I should check because i double checked everything but when I plug it in no lights and it doesn’t show any rpm

[@decentgarage]

Check the plug with a bolt meter. Does everything else work on your truck like ac, cruise, charging, overdrive?

[@nickmaglet9858]

I know my pcm is so I ordered a one wire alternator with a tach terminal on it I hooked up the signal wire and the tach needle just jumps around then pegs out at 4k. Could it be sending the wrong signal or a faulty tach?

[@decentgarage]

Interesting! I actually didn't even know you could buy a 1 wire alt with a tach signal wire. It sounds like the signal it's using is for a gas tach though. It may be worth calling the company to see if it can be recalibrated for a diesel tach.

[@nickmaglet9858]

@@decentgarage The company is Hagemeister Enterprise in Oregon. They made a one wire alternator for the cummims specifically for them. You can get one with or without a tach terminal, but I can't get my tach to read correctly I didn't know if it is a tach issue or if there was a way to test the signal.

[@nbanegro1276]

What is the harness for the early models?

[@decentgarage]

It's a magnetic pickup sensor. I'll show the parts number in an upcoming video

[@billybobboggs8080]

Do you know if the 91.5 would have that plug under the dash?

[@decentgarage]

I don't believe it does but climb in and check. My buddy has a 91.5 that ill check when I get a chance too

[@559skatercrew]

@@decentgarage did y’all ever find out if the 91.5 had the plug under dash?

[@MoneyBadgerProductions]

Man its just that easy? Could I have a bad tach?? The needle jumps just slightly when I turn on the key, and jumps slightly again when I start the truck but both times it falls right back to 0

[@decentgarage]

Do you have the dealer installed tach. I'd check the ground first and then check this harness

[@MoneyBadgerProductions]

@@decentgarage no its a 4k classic isspro tach, ill definitely check the ground. Im not running a light for mine so idk if it would come on

[@PowerstrokeBoiz]

Do your trucks have AC? New here and I could never tell/see a compressor

[@decentgarage]

Yes, both do

[@PowerstrokeBoiz]

@@decentgarage could you make a video showing the setup in these trucks. Would love to see

[@decentgarage]

What all do you want to see? The compressor and lines?

[@PowerstrokeBoiz]

@@decentgarage yes please. Just wanna familiarize myself with the truck

[@joebommarito8374]

I have a 89 Cummins the stator method sucks help

[@decentgarage]

Is that the magnetic pickup?

[@TheToyotaAbuser]

Does it work with internal regulator mod

[@decentgarage]

Good question! Not sure the answer but I'll know next week when I install in on prospector bob. Should work fine as long as the cps and ECM work

[@bradentopp867]

I can’t find the tack on Geno’s garage

[@decentgarage]

They are probably sold out. The hungry diesel has a similar one in stock and they have the wire harness

[@bradentopp867]

@@decentgarage ok thank you

[@Kyle-iz5qt]

The older model video would be much appreciated lol.. Ive had a tach for over a year waiting to go in and i just can't find enough information for the confidence to do it.

[@decentgarage]

I planned on doing the magnetic pickup system on prospector bob but then discovered it has a 92 harness so I'm going to do the same install as this video.

[@gusocon319]

where is the part number?

[@decentgarage]

Sorry i forgot to show that. It's R5501

[@rey11640]

Would be be possible in my 91.5

[@decentgarage]

91.5 is a bastard child when it comes to wiring so I don't know for sure. Check if you have the connecter for it under your dash.

[@rey11640]

@@decentgarage Bahaha 🤣 bastard child is correct.. I got 91.5 the connector under dash is 3 pin not 4 pin like yours..

[@peterschmidt2849]

😎🇺🇸

[@decentgarage]

Thanks

[@tuckercobern8954]

I don’t know if you’ll see this after all this time, but I’m looking to put a tach on my truck with a 318 in it. Does it work the same way? Any difference in the wiring/harness I need or whatever? I’m pretty stupid when it comes to electronics and wiring so I want to make sure I don’t go buying a bunch of parts I can’t even use.

[@decentgarage]

I do not believe this will work on the gas engine, at least I don't think it has the factory plug as shown in this video. An option for you would be to get a PA performance alternator with the tach signal option.

[@tuckercobern8954]

@@decentgarage alright, thanks for letting me know before I went and wasted my money lol. One more question though if you don’t mind. I watched your video from a while back when you installed new LED headlights into your truck and I bought a pair of the same ones for mine. I’ve heard some complaints from people that for whatever reason they’re finnicky in cold weather and often don’t want to turn on. If I’m not mistaken you’re from Canada so your winters are probably a good bit colder than where I live, just curious if you’ve had any issues with that? I definitely need some brighter lights but obviously can’t install them if it’s gonna cause me to be without headlights entirely during the winter.

[@decentgarage]

@@tuckercobern8954 I'm in Utah so we get winter here but not as bad as Canada. Almost 3 years since I installed the headlights and I've had 0 issues at all. I love them

[@tuckercobern8954]

@@decentgarage I must’ve been thinking of one of the other big first gen guys then, not sure who it is that lives in Canada lol. Thanks for the info though, I’ll be very glad to get those installed.

[@decentgarage]

@@tuckercobern8954 Tyler ovens with Ovens garage is in canada