GM speedo sender - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Electrical
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 05-20-2005, 09:48 AM
Member
 
Last photo:
Join Date: May 2002
Location: Allentown, PA
Age: 67
Posts: 87
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
GM speedo sender

I asked a while ago about wiring an unknown speedo sender (only markings are SBY 04-04) to a Dolphin speedo. The Dolphin sender has 2 wires, grey and blue. The sender I have has 3 wires. The Dolphin sender doesn't fit so I need to use the other sender.

The directions that I have say to hook the pulse generator wires to the speedometer 4 pin connector as follows:

Black PG wire to 4 pin speedometer connector black wire
Red PG wire to 12v ignition
White PG wire (sender output) to 4 pin speedometer connector white wire

Does anyone know what the GM colors might correspond to? My understanding is the Black is 'generally' ground. The problem is that the PG has markings in the plastic where the male connector is such that the white wire connects to a G, the Black wire connects to a - and the Red wire to a +. Maybe the G on the sender doesn't mean Ground.

Probably as clear as mud!!

Thanks,

Bill

    Advertisement

Last edited by longt; 05-20-2005 at 09:49 AM. Reason: poor wording
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 05-20-2005, 09:58 AM
1931 steve's Avatar
Hotrodders.com Moderator
 
Last wiki edit: How to rebuild an engine Last photo:
Join Date: Nov 2004
Location: Michigan
Age: 43
Posts: 1,207
Wiki Edits: 4

Thanks: 0
Thanked 0 Times in 0 Posts
What type of vehicle are you working on, and what trans is in it (if this is where the speed sensor is)???
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-20-2005, 10:28 AM
Member
 
Last photo:
Join Date: May 2002
Location: Allentown, PA
Age: 67
Posts: 87
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Sorry about leaving that out.

The car is a T-Bucket. It has a 350 engine and a 350 transmission. The sensor goes into the speedometer cable output on the transmission. The interference with the Dolphin sensor is that it is too big and hits the trans mount.

Bill
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 05-20-2005, 11:14 AM
1931 steve's Avatar
Hotrodders.com Moderator
 
Last wiki edit: How to rebuild an engine Last photo:
Join Date: Nov 2004
Location: Michigan
Age: 43
Posts: 1,207
Wiki Edits: 4

Thanks: 0
Thanked 0 Times in 0 Posts
What type of speed sensor are you trying to use? is it a GM type? How many pins for wiring does it have? Also do you know what year and make it would fit? If I know this I can more than likely get wire colors for you. Do you have the wires from the speedo to the speed sensor in place? If so what colors are they?
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 05-20-2005, 03:06 PM
Member
 
Last photo:
Join Date: May 2002
Location: Allentown, PA
Age: 67
Posts: 87
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
No idea what the sensor comes from. The instructions just say to wire a GM speedometer to wire as I said in the first post. The GM speedometer apparently has a 4 connection connector. At least that is what the instructions say.


The sensor has 3 wires, red, black and white. The markings on the sensor have a + where the red wire attaches, a - where the black wire attaches and a G where the white wire attaches. There are no wires from the speedometer just screws on the back to make connections..

The Dolphin sensor has 2 wires gray and blue. I looked at the Dolphin instructions. The wires from their sensor to their speedometer show that one goes to the sender connection and one goes to ground. They DO NOT specify which color goes to which connection.

Maybe it doesn't matter.

UPDATE: I was just talking to a Bracket Racer at work. His thought was that the G meant GAUGE NOT GROUND as I thought. Seems reasonable to me. There is an S on the speedometer for the wire coming FROM the sender. The G on the sender means it goes TO the gauge. The black wire goes to ground. DOH!!!

My brain hurts, think I'll take a nap.

Thanks,

Bill
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 05-23-2005, 02:41 PM
Member
 
Last photo:
Join Date: May 2002
Location: Allentown, PA
Age: 67
Posts: 87
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
To follow up. I wired the sender to the speedo as I thought it should be. Red to 12v ign, Black to chassis ground and white to the gauge. The speedo works.

One step closer! PA inspection next week. Then wait for PennDOT to approve application.
Reply With Quote Quick reply to this message

Recent Electrical posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last 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:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
How to properly mate a GM pump to a Mustang II rack Centerline Suspension - Brakes - Steering 73 10-31-2009 12:59 PM
Aftermarket Temp Sender? Seon Engine 11 10-29-2004 09:31 PM
Speedo calibration novatech Transmission - Rearend 2 02-12-2004 08:46 PM
GM Gas Gage Sender Problem bluesman123 Electrical 3 09-02-2003 10:53 AM
Speedo not working..4spd Trav Transmission - Rearend 5 07-31-2003 02:21 AM


All times are GMT -6. The time now is 08:36 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.