- -

Welcome Anonymous

Latest: dpa350
New Today: 1
New Yesterday: 0
Overall: 887

People Online:
Members: 8
Visitors: 0
Bots: 12
Total: 20
Who Is Where:
01. Forums
02. Login
03. Forums
04. Forums
05. Forums
06. Forums
07. Forums
08. Forums
09. Forums
10. Forums
11. Login
12. Login
Hidden: 3
Staff Online:

No staff members are online!
We have received
page views since
July 27, 2010

Hits New Today: 18077
Hits New Yesterday: 18657

Server Time
19 November 2017 21:38:09 AEDT (GMT +11)
Mustang Technical Discussion > Pre 1973 > Electrical stuff > Community Forums > Mustang Forum Australia - Mustang Tech

View posts since last visitView posts last 24 hoursView unanswered posts
Forum Index > Pre 1973

Electrical stuff Reply to topic

Author Message
Junior Mustang

Joined: Dec 20, 2010
Posts: 126
Location: Perth WA

0 👍 / 0 👎

Ok I' been reading up a bit about Mustang instruments and read that the ammeter on 67/68 rarely works and must of them shat themselves very early in the cars life. The recommendation is to bypass the wire that connects to the Ammeter to prevent an electrical fire occurring in the future. So by the term by passing do they mean disconnect the red and yellow wire and connecting the two together? Now this seems kind of odd to me, as we all know ( by reading our mustang circuit diagrams) the red and yellow wire both come from the Battery side of the starter solenoid. This means there should be power at both terminal posts behind the ammeter, am I right? and if so why does an ammeter require power at both terminals?.
As I have never really had the cars electrical system up and running fully, I am only assuming (from what I've read ) that the ammeter is actually US. I have checked to see if there is continuity between the red and yellow wires to the ammeter and there is. does this mean the ammeter works?
Whilst on the subject of wires etc I also have one of those retro style sound systems to fit. whilst one wire powers via the ignition switch there is another wire which is supposed to connect to the battery (hot) would that afore mentioned red wire to the ammeter be a suitable connecting point for the hot wire to the sound system.


View user's profileSend e-mail
Mustang King

Joined: Aug 01, 2010
Posts: 6364
Location: Perth

0 👍 / 0 👎

I think you should be able to simply disconnect the two wires from the ammeter. No need to short them together. Yes you are right, there is power at both terminals. The ammeter looks at any the slight imbalance between the alternator output and the battery. All ammeters will have power on both terminal as there are in a series circuit.
When you checked continuity, do you mean with the red and yellow wire disconnected and the meter across the terminals of the ammeter? If so then your meter may well be ok.
You could use the red wire input for your stereo constant 12v, just not sure if it would effect the ammeter reading.


View user's profilePhoto Gallery
All times are Australia/Sydney

Jump to:







Last 10 Forum Messages

Last post by gbx78 in Mustang Projects on Nov 19, 2017 21:19:47

56 effie.. FnL
Last post by nassi in Other Projects on Nov 19, 2017 21:17:31

Husky's 65 Restomod
Last post by unilec5544 in Mustang Projects on Nov 19, 2017 21:00:54

Jacko's Project
Last post by Ausjacko in Other Projects on Nov 19, 2017 20:40:25

[SOLD] FS 64-66 Rubber Grommet kit Scott Drake *new
Last post by gbx78 in Mustang Parts for Sale on Nov 19, 2017 19:20:51

FS 1967 LHD Deluxe Instrument Bezel and Dash Panels Alloy
Last post by gbx78 in Mustang Parts for Sale on Nov 19, 2017 19:16:23

FS Lots of performance parts (NEW/used)incl 351W D block
Last post by gbx78 in Mustang Parts for Sale on Nov 19, 2017 18:01:16

FS Canfield 195 High Port Aluminium Heads **NEW
Last post by gbx78 in Mustang Parts for Sale on Nov 19, 2017 17:38:23

FS Ultra Gold Comp Cams Rockers 19044-16 7/16" **NEW
Last post by gbx78 in Mustang Parts for Sale on Nov 19, 2017 17:32:18

Project Lime A code.
Last post by Shaunp in Mustang Projects on Nov 19, 2017 15:53:50


Like this page? Google +1 it!