1969 - 1970 Mustang Instrument Repair and Restoration, Only!
#1
Free Estimates, Reasonable Rates, Expert Advice, Authorized Service!
Hours: Monday-Friday 10:00 to 6:00 EST!
For Service in the U.S.: 1-800-327-8716
For Service Outside the U.S. & Local: 1-864-895-4404
[Image: tachrun.jpg]

Very informative site on Tachs and Gauges etc..

The website is a little hard to find stuff but it is worth the hunt.

MUSTANG/FORD TACHOMETERS (MOST 1963-76 FORD, 1965-73 MUSTANG) CAN CAUSE YOUR ENGINE NOT TO START. THE 12 VOLTS TO THE PLUS SIDE OF THE COIL GOES THROUGH THE TACHOMETER ELECTRONIC CIRCUIT THAT CONTAINS A SPECIAL INPUT ISOLATION TRANSFORMER. IF THE PRIMARY OF THE TRANSFORMER IS BURNED UP OR OPEN NO VOLTAGE AND THE RESULTING CURRENT FLOW WILL GET TO THE PLUS SIDE OF THE COIL. THEREFORE YOUR ENGINE WILL NOT START. THE CIRCUIT ON THE BLACK WIRE SIDE OF THE TACH GOING TO THE COIL ALSO CONTAINS A CALIBRATED BALLAST RESISTANCE BEFORE IT GETS TO THE PLUS SIDE OF THE COIL. THIS CALIBRATED RESISTANCE WIRE IS 1.5 OHMS. THE BALLAST RESISTANCE WIRE IS MADE OF TUNGSTEN TO WITH STAND HEAT. NEVER CUT THIS WIRE AS IT CAN'T BE RESTORED IN ANY WAY. THE BEST WAY TO CHECK THIS IS TO INSTALL A KNOWN GOOD TACHOMETER AND SEE IF THE ENGINE WILL START. ANOTHER WAY IS TO FIND A GOOD VOLT-OHM METER AND SELECT THE OHMS R TIMES 1 SCALE AND MEASURE ACROSS THE 2 LEADS COMING OUT OF THE TACH. IF THE METER READS OPEN OR NO RESISTANCE AT ALL, THEN THE TACH'S INTERNAL ELECTRONIC CIRCUIT IS DEFECTIVE. IF THE TACH LEADS READ AROUND 1 OHM OR SO AND THE CAR STARTS, BUT THE TACH STILL DOES NOT WORK, THEN THE TACH METER OR ELECTRONIC CIRCUIT STILL NEEDS REPAIR. IF YOU NEED TO SEND YOUR TACH TO US FOR REPAIR, YOU CAN REMOVE THE MALE AND FEMALE BANANA PLUGS FROM YOUR TACH LEADS AND JUMPER THEM TOGETHER. THE ENGINE WILL RUN WITH THE TACH OUT OF THE CIRCUIT WHILE IT IS BEING SERVICED. SINCE H&H AUTO IS AUTHORIZED FORD/MUSTANG SERVICE, WE CAN REPAIR THESE TACH'S QUICKLY AND AT AN AFFORDABLE PRICE. NEVER ALLOW ANY INSTRUMENT REPAIR SHOP TO CONVERT YOUR FORD/MUSTANG TACH TO THE MINUS SIDE OF THE COIL AS SERIOUS DAMAGE WILL OCCUR. CALL H&H AUTO AT TOLL FREE: 1-800-327-8716 OR EMAIL US AT tachman@bellsouth.net AND WE WILL REPAIR YOUR FORD TACHOMETER. ANY PARTS INSTALLED BY THE TACHMAN CARRY A 2 YEAR WARRANTY WITH EXPERT TECH ASSISTANCE!
Reply


Possibly Related Threads...
Thread Author Replies Views Last Post
  1970 mustang mirror chrome bezel nut Raytags 0 999 11-14-2019, 06:02 AM
Last Post: Raytags
  1970 FORD MUSTANG STEERING COLUMN SHROUD SHIELD RETAINER CLIP-D0ZZ-3530-A Raytags 0 824 09-12-2019, 01:08 AM
Last Post: Raytags
  Fixed rear seat on 1970 tanataur 8 10,419 02-22-2014, 02:22 AM
Last Post: Mustangmike
  Headliner install 1969 Mach1 1969jimmach 14 22,751 04-28-2012, 09:01 AM
Last Post: 1969jimmach
  Wanted:1970 Rim Blow wheel w/no cracks Unrestored Masterblaster7212 14 16,807 01-17-2012, 02:26 AM
Last Post: Steven Harris
  1969-1970 Mustang Mach 1 seats Mach 1 Club 0 4,552 09-28-2011, 08:22 AM
Last Post: Mach 1 Club
  Rear fold down seat 1969 mach1 1969jimmach 8 13,210 08-30-2011, 11:27 AM
Last Post: 1969jimmach
  Rechrmoing of instrument panel? cdesje 7 10,214 07-20-2011, 12:27 PM
Last Post: cdesje
  1970 Mach 1 Speakers rmashmore 3 7,805 10-07-2010, 12:20 PM
Last Post: JTS71 Mach1
  1969 Mustang Mach 1 Seats Mach 1 Club 0 4,344 06-17-2010, 02:24 AM
Last Post: Mach 1 Club

Forum Jump:


Users browsing this thread: 1 Guest(s)
[-]
Latest Threads
Truth be Known
Last Post: JTS71 Mach1
Today 12:59 PM
» Replies: 0
» Views: 3
68 Bullitt Mustang
Last Post: Mustangmike
01-20-2020 08:25 PM
» Replies: 2
» Views: 325
EFI change over from carb
Last Post: Tbellaw
01-20-2020 01:13 PM
» Replies: 0
» Views: 104
Newbie - Just brought this baby home
Last Post: Mustangmike
01-20-2020 04:08 AM
» Replies: 7
» Views: 3974
Fuel line
Last Post: Mustangmike
01-20-2020 03:42 AM
» Replies: 3
» Views: 197
Newbie
Last Post: Mustangmike
01-20-2020 01:56 AM
» Replies: 6
» Views: 191
ABS Control Module
Last Post: JTS71 Mach1
01-13-2020 01:31 PM
» Replies: 2
» Views: 242
Fresh Motor
Last Post: Mustangmike
01-13-2020 04:57 AM
» Replies: 4
» Views: 468
New Member with 73 Mach 1
Last Post: Mister 4x4
01-04-2020 06:09 AM
» Replies: 2
» Views: 791
A Little Shaky
Last Post: Mister 4x4
01-04-2020 06:08 AM
» Replies: 4
» Views: 697
Been Awhile... '71 Rustang
Last Post: Mister 4x4
01-04-2020 06:07 AM
» Replies: 169
» Views: 181118
Subframe connectors
Last Post: JTS71 Mach1
01-04-2020 04:13 AM
» Replies: 3
» Views: 1940
HAPPY NEW YEAR!
Last Post: Steven Harris
01-03-2020 02:05 PM
» Replies: 4
» Views: 662
MERRY CHRISTMAS!
Last Post: Rare Pony
12-25-2019 02:15 PM
» Replies: 4
» Views: 1049
Torque Converter Stall Speeds
Last Post: JTS71 Mach1
12-22-2019 04:46 AM
» Replies: 4
» Views: 1123
Do I have the wrong spoiler?
Last Post: Jonner B
12-18-2019 09:28 AM
» Replies: 8
» Views: 1974
Hard Exhaust Seats on a 390
Last Post: Mustangmike
12-10-2019 10:11 AM
» Replies: 5
» Views: 1751
Happy Thanksgiving!
Last Post: Mustangmike
11-29-2019 11:41 PM
» Replies: 2
» Views: 990
Certificate Issues
Last Post: Mister 4x4
11-24-2019 09:05 AM
» Replies: 5
» Views: 1520
Cylinder lube for a long time stored mot...
Last Post: Steven Harris
11-22-2019 06:44 AM
» Replies: 7
» Views: 2757

>