I need some tachometer help please
Mar 17, 2009 | 05:26 PM
#1
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From: Roseburg , OR
I need some tachometer help please
Ive recently put in a sr5 gauge, everything works. I hooked up the tach to the spot in the back of the gauge, where the connecter is. and have it hooked to the yellow wire comming off the coil. but its always reads 7k does this mean its a bad tach in the gauge, or just have the wrong spot?
Last edited by waskillywabbit; Mar 17, 2009 at 06:24 PM. Reason: Title clarity
Mar 18, 2009 | 05:52 PM
#3
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From: raleigh,nc
on my 81, I was told that I would need a seperate wire for the tach when I did the swap, however I decided to just try it without the new wire. Unhooked the stock non SR5 cluster and hooked up the new SR5 cluster with the same connections, and the tach worked. I know the gauges are different style wise, but should function the same. JUst my .02.
Mar 18, 2009 | 08:28 PM
#5
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From: Tacoma, Washington
on my 81, I was told that I would need a seperate wire for the tach when I did the swap, however I decided to just try it without the new wire. Unhooked the stock non SR5 cluster and hooked up the new SR5 cluster with the same connections, and the tach worked. I know the gauges are different style wise, but should function the same. JUst my .02.
Mar 18, 2009 | 09:46 PM
#6
dunno if this might help but I just saw this over on Pirate about tach stuff:
I know exactly what you're talking about. The 82-83 clusters have rectangular plugs and the 79-81 have round plugs. I remember finding a thread on pirate that showed how to pull the pins and repin for a newer style instrument cluster, but I opted out of that and decided to just purchase a 79-81 SR5 
Anyways, back to the tech. I'm about to go back outside to the garage, stressful day started drinking :beer::beer:, all tanked up now. We'll see what I can do about my 2nd gen tach. I already knew to hook up the SR5 oil sending unit, so that's already on the block. I did lots of research since my last post, and found out that the fuel sending unit might be different between 22r and 22re's (https://www.yotatech.com/forums/f2/i...er-swap-18019/) and I remember I was about 1/2 full before pulling my stock 87 cluster, but after installing my SR5 cluster, it was reading around 2/3 full, so i just went to the gas station and got 4.5 gallons in...i guess it's accurate.
http://www.pirate4x4.com/forum/showthread.php?t=209942
http://www.barneymc.com/TOY_ROOT/TEC...R/sr5_gage.htm
http://www.tundrasolutions.com/forum...ap-for-1988-a/
http://www.brian894x4.com/Gaugeclust...ustertech.html
Anyways, As per this write up(http://www.humboldt.edu/~pke1/Truck/), I will be taking the cluster back out and installing the tach wire, and I might even change the Mileage as well; It did have a full engine rebuild, after all, and my title says "TRUE MILEAGE UNKNOWN:grinpimp:
My black tach wire happens to be 'snipped' already? (the plastic insulation doesn't show wire for at least an 1/8th of an inch down). You're looking for the negative wire, anyone who's wondering. I don't know if it was by the previous owner, almost looks like this is the way it was from the factory. It was tucked in with the 2 wire plugs casing. Anyways, I'll be back later with an update.
Anyways, back to the tech. I'm about to go back outside to the garage, stressful day started drinking :beer::beer:, all tanked up now. We'll see what I can do about my 2nd gen tach. I already knew to hook up the SR5 oil sending unit, so that's already on the block. I did lots of research since my last post, and found out that the fuel sending unit might be different between 22r and 22re's (https://www.yotatech.com/forums/f2/i...er-swap-18019/) and I remember I was about 1/2 full before pulling my stock 87 cluster, but after installing my SR5 cluster, it was reading around 2/3 full, so i just went to the gas station and got 4.5 gallons in...i guess it's accurate.
http://www.pirate4x4.com/forum/showthread.php?t=209942
http://www.barneymc.com/TOY_ROOT/TEC...R/sr5_gage.htm
http://www.tundrasolutions.com/forum...ap-for-1988-a/
http://www.brian894x4.com/Gaugeclust...ustertech.html
Anyways, As per this write up(http://www.humboldt.edu/~pke1/Truck/), I will be taking the cluster back out and installing the tach wire, and I might even change the Mileage as well; It did have a full engine rebuild, after all, and my title says "TRUE MILEAGE UNKNOWN:grinpimp:
My black tach wire happens to be 'snipped' already? (the plastic insulation doesn't show wire for at least an 1/8th of an inch down). You're looking for the negative wire, anyone who's wondering. I don't know if it was by the previous owner, almost looks like this is the way it was from the factory. It was tucked in with the 2 wire plugs casing. Anyways, I'll be back later with an update.
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Mar 19, 2009 | 05:36 AM
#8
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From: Montana
Yup. Seems that everything before '82 and after '83 is more or less plug & play. Especially the EFI's. Maybe with the 84 on carbed trucks you had to run a wire. Anyway, the 82 & 83's are NOT plug & play, as a couple threads going around illustrate. There may be two wires that you don't have to move, and you definitely have to run a tach wire.
Mar 19, 2009 | 01:19 PM
#9
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From: Montana
Oh yeah, and my tach wire is going into the...I think it was green wire plug? Definitely no the yellow wire. On my truck the yellow wire/plug has two wires coming out of it already. The one I ran my tach off of had just a cover/plug on it and nothing running out of it.
Mar 19, 2009 | 04:34 PM
#10
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From: raleigh,nc
Mar 25, 2009 | 10:44 PM
#12
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From: Roseburg , OR
well from the http://www.humboldt.edu/~pke1/Truck/ I have the right connecter but the tach spot on the harness is differnt mines on the grey connecter since I have the same year as 83 I used his same wireing diagram that he has in his truck and everything else works I mean it comes on sometimes and sometimes it will pop on when the key off. so im guessing its busted but if it is I already have another on its way... so it wont hurt to try another slot on the blue..
Mar 26, 2009 | 05:33 AM
#13
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From: Montana
Your non-SR5 gauge worked fine before you did the swap? Sounds like a loose connect/bad ground or something weird. Unless the entire cluster is just totally screwed up..but it seems more likely it's a wiring issue. You didn't have any weird issues before the swap?
Mar 31, 2009 | 09:38 PM
#14
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From: Roseburg , OR
update ... Everything is working turns out that the tach wire wasnt even in when it was doing the 7 K lol but yah got everything working now if there was only a way to turn the lights blue to match my stereo deck.
Apr 3, 2009 | 11:42 PM
#16
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From: Roseburg , OR
well the girl friend had an accident with her prelude so I was gonna borrow one of her blue blubs fits our backs but the gauges have a solid piece of green so I dont know how it will look.
Jul 19, 2009 | 01:55 PM
#17
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From: Mexicali, Baja California Mexico
Just a lost question I have what's your opinion.... I have my tach broken I'm planning in buying an exterior one would you recomend me in fixing the original or it is to much work for it and better buying the exterior.....
Thanks
Thanks
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