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06-22-2003, 12:17 PM
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#1
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3 Rivet Member 
Join Date: Apr 2003
Posts: 119
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Where is the tachometer connection?
My tachometer quit working after the AC man and the brake man worked on the unit. I figure a loose connection somewhere. Where should I look?
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06-22-2003, 01:30 PM
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#2
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Rivet Master 
LOST
, Hawaii
Join Date: Jun 2002
Posts: 2,193
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Next to the power feed on the side of the distributor.
John
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06-29-2003, 08:38 AM
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#3
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3 Rivet Member
Join Date: Apr 2003
Posts: 119
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I have a square device about 1" X 1" with a small coil of wire that is zip tied on to spark plug wire #1. It is plastic with a metal U shaped rod around the outside. (I wish I could figure out how to post pictures, I could take the picture). Is this where the tachometer gets input via a current induction?
How is this device supposed to be installed. I looks like someone dislodged it and just zip tied it back onto the spark plug wire.
I still do not know which of the several wires that plug into the distributor would be the tachometer related wire. All wires seem to be intact.
I could email the picture if I had an email address.
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06-29-2003, 08:41 AM
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#4
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Just a member
1978 28' Argosy 28
Lutz
, Florida
Join Date: Mar 2002
Posts: 4,549
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With the doghouse open look at the top of the distributor. There should be a square bump on the left side. The lettering should have tach and ground. The tach feed connection is under this cover. I have no idea what the coil and u shaped thing is. The tach is usally fed by a single wire with a blade connector fed to the distributor.
__________________
Brett G
WBCCI #5501 AIR # 49
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1978 Argosy 28 foot Motorhome
Wise men talk because they have something to say; fools, because they have to say something. -- Plato
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06-29-2003, 09:17 AM
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#5
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Rivet Master
LOST
, Hawaii
Join Date: Jun 2002
Posts: 2,193
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Sounds like an aftermarket tach inductive pickup. It won't matter which wire it goes on as long as that plug is firing.
John
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06-29-2003, 09:19 AM
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#6
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Rivet Master
1959 22' Caravanner
Atlanta
, Georgia
Join Date: Feb 2003
Posts: 2,197
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Quote:
Originally posted by AccessMaster
I have a square device about 1" X 1" with a small coil of wire that is zip tied on to spark plug wire #1. It is plastic with a metal U shaped rod around the outside. (I wish I could figure out how to post pictures, I could take the picture). Is this where the tachometer gets input via a current induction?
How is this device supposed to be installed. I looks like someone dislodged it and just zip tied it back onto the spark plug wire.
I still do not know which of the several wires that plug into the distributor would be the tachometer related wire. All wires seem to be intact.
I could email the picture if I had an email address.
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Is yours Fuel injected? Fuel injected uses a different distributor and the coil is usualy mounted seperate on a bracket off the intake. There will be 4 wires going to the coil and the big fat spark wire off the top going to the center of the distributor. As I recall two are brown and two are white and their may be a stripe some of them. On one of those wires will be a pig tail with a female sapde connection that may be taped to one of the wires. That's the Tach wire for Fuel injected engines. Just crimp a male spade end on the trigger wire for your tach and plug it in.
If it's carb then it should have HEI or ESC distributor. Both are like was mentioned and on the distributor cap is the Nub with all the electrical connections. It will be clearly marked TACH as was memntioned. You will need a Female spade end to connect to that style.
__________________
1959 22' Caravanner
1988 R20 454 Suburban.
Atlanta, GA
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06-29-2003, 09:51 AM
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#7
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3 Rivet Member
Join Date: Apr 2003
Posts: 119
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You were right. However, a wire is pigtailed off of the tach connection. One wire goes toward the front and ends up at the tach I presume. The other wire goes toward the rear. Any idea why?
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06-29-2003, 09:53 AM
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#8
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3 Rivet Member
Join Date: Apr 2003
Posts: 119
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It is fuel injected. 1988 454
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06-29-2003, 10:01 AM
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#9
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3 Rivet Member
Join Date: Apr 2003
Posts: 119
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Sorry Guys. I asked and was told that I had fuel injection since I have a 1988 454. Well mine is carburated. The tach is connected as the thenewkid discribed.
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06-29-2003, 10:07 AM
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#10
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3 Rivet Member
Join Date: Apr 2003
Posts: 119
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The pigtailed wire plugs into the transmission. Would that be related to the cruise control?
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06-29-2003, 10:09 AM
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#11
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3 Rivet Member
Join Date: Apr 2003
Posts: 119
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Could the inductive pick up be related to the cruise control?
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06-29-2003, 11:27 AM
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#12
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Rivet Master
LOST
, Hawaii
Join Date: Jun 2002
Posts: 2,193
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Factory cruise will have a small sender off the speedo gear.
Are the cruise and tach factory or aftermarket?
John
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06-29-2003, 04:04 PM
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#13
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3 Rivet Member
Join Date: Apr 2003
Posts: 119
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Everything appears to be factory.
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06-29-2003, 05:26 PM
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#14
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Rivet Master
LOST
, Hawaii
Join Date: Jun 2002
Posts: 2,193
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If factory the tach runs off the distributor. The cruise has a module driven by the speedo cable. It will have the cable in and out, vacuum in and out and a wire harness.
The wires on the trans are neutral start if they go to the linkage or kickdown if the go into the trans case.
No inductive pickups from the factory.
John
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