Tap into dimmer rheostat for aftermarket gauge lighting - Ford Mustang Forums : Corral.net Mustang Forum
 
LinkBack Thread Tools Display Modes
post #1 of 5 Old 12-29-2017, 11:09 PM Thread Starter
Registered User
 
MercuryFox50's Avatar
 
Trader Feedback: (0)
Join Date: Nov 2004
Location: Akron, Ohio
Posts: 108
Tap into dimmer rheostat for aftermarket gauge lighting

To whom it may concern:

I have looked through my Haynes manual and have spent a couple hours searching the forums. I''ve found several wiring diagrams and threads with the same topic; just not sure that I've found the best answer yet.

I've added a pair of Autometer gauges and would like to wire the gauge bulbs so they dim with the factory '86 Mustang/Capri dimmer rheostat.

My questions are:
1: What color is the wire that I can tap into for rheostat dimmable power for my gauges (for an '86)? From what I have read, it looks like Light Blue with a Red stripe?
2: Would it be better to add a fuse tap off of 5A fuse "13/Instrument Illumination" in the fuse box rather than tapping into the wire between the rheostat and factory gauges?
3: What gauge wire should I use?
4: Ok to just run the Autometer gauge ground wire to a suitable chassis ground or should I ground to the O.E. gauge ground wire?


'86 Capri RS; G-Force/Hanlon T-5; Ram HDX Clutch, QuickTime SFI Bellhousing; MM Clutch Cable Kit; '87-'93 Spindles, Brakes & Struts; SSBC Rear Disk Brake Kit; BBK Long-tube headers & X-pipe; Flowmaster Mufflers; A/C Elim.; 17x9 Cobra R Wheels; March UD Pulleys; 12 Deg. Timing; 190lph FP; 3:73s'
MercuryFox50 is offline  
Sponsored Links
Advertisement
 
post #2 of 5 Old 12-29-2017, 11:41 PM
Registered User
 
90trunk's Avatar
 
Trader Feedback: (3)
Join Date: Nov 1999
Location: Downriver DTW, MI
Posts: 1,548
Quote:
Originally Posted by MercuryFox50 View Post
My questions are:
1: What color is the wire that I can tap into for rheostat dimmable power for my gauges (for an '86)? From what I have read, it looks like Light Blue with a Red stripe?
2: Would it be better to add a fuse tap off of 5A fuse "13/Instrument Illumination" in the fuse box rather than tapping into the wire between the rheostat and factory gauges?
3: What gauge wire should I use?
4: Ok to just run the Autometer gauge ground wire to a suitable chassis ground or should I ground to the O.E. gauge ground wire?
1: Light blue with the red stripe is correct.
2: For a few gauges I would just tap into the light blue with red wire in a convenient spot.
3: I would lean toward 16 gauge. 14 Gauge would be be overkill.
4: Any suitable chassis ground will work.


Regards,
Craig
[email protected] at Milan,3450#...
Dynojet'd 286rwhp/331rwtq Stock Cam, GT40 Irons
90trunk is offline  
post #3 of 5 Old 12-29-2017, 11:50 PM
Registered User
 
90trunk's Avatar
 
Trader Feedback: (3)
Join Date: Nov 1999
Location: Downriver DTW, MI
Posts: 1,548
Bonus Round: Autometer sells blue bulb covers for incandescent bulbs that give the gauges a nicer look at night. I tried some blue and green LEDs, but they were too dark. Edit: Sorry 'bout the 90* spin on the image. It was correct on my phone...SMH.
Attached Images
File Type: jpg 178384B3-BB44-4EB3-9DB1-D3A914DF0A12.jpg (103.1 KB, 15 views)

Regards,
Craig
[email protected] at Milan,3450#...
Dynojet'd 286rwhp/331rwtq Stock Cam, GT40 Irons
90trunk is offline  
Sponsored Links
Advertisement
 
post #4 of 5 Old 12-30-2017, 12:10 PM
Registered User
 
indy2000's Avatar
 
Trader Feedback: (3)
Join Date: Oct 2001
Location: vancouver
Posts: 21,304
if you use the existing fuse protection for the bulb circuit

you must use the same wire that is there

the fuse is to protect the wire.........if you use a smaller wire, you will have a fire, if it were to short.

if you plan to use a dedicated fuse

you size the wire to the load and the fuse to the wire, that is how you do it.

89 GT gr-40, KB2200(10psi), tweecer R/T,LC-1, 22gal cell, w/tailpipes.
indy2000 is offline  
post #5 of 5 Old 12-30-2017, 02:22 PM Thread Starter
Registered User
 
MercuryFox50's Avatar
 
Trader Feedback: (0)
Join Date: Nov 2004
Location: Akron, Ohio
Posts: 108
Thank you for the information Indy2000 and 90trunk.
MercuryFox50 is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Mustang Forums : Corral.net Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Where to tap for boost / vacuum gauge ? poostang 94/95 Tech 12 12-24-2002 09:27 AM
Installing gauge - where do I tap into the factory gauge light circuit ? SC95 Electrical & Wiring 6 04-26-2002 08:08 PM
Color of wire for dimmer / light on mechanical fuel gauge 86style Electrical & Wiring 2 03-24-2002 10:59 PM
Dimmer switch, - lighting problems pagt General Mustang Tech 14 01-13-2002 07:29 PM
Serious questions dilemma about mechanical oil PSI gauge and DOHC oil PSI readings Cobra Jet NJ GT & SOHC 11 12-14-2001 04:19 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome