new switches... - 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 06-02-2006, 12:13 AM
Registered User
 
Last photo:
Join Date: Jan 2004
Location: Houston, TX
Age: 31
Posts: 126
Wiki Edits: 0

Thanks: 10
Thanked 0 Times in 0 Posts
new switches...

I just got in 5 of these painless wiring switches for my custom dash I am making. I thought I was going to get 2 prongs on the back, just complete the circuit, that simple... but they have 4 prongs on the back and I don't know what to do with all of them.... Am I supposed to use a relay? Am I supposed to have ground & light sources? Can I only use 2? Here is a link to the switch...

thanks for any help,
sean s.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-02-2006, 12:27 AM
docvette's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Rebuild an alternator Last photo:
Join Date: Mar 2004
Location: Lafayette, california
Age: 62
Posts: 7,362
Wiki Edits: 12

Thanks: 0
Thanked 6 Times in 3 Posts
Doc here,

Two of the terminals are switch contacts, Center wiper and normally open.

The other two are lamp wire power and ground.

Relays are dependent on what you are trying to control with the switch, the contact rating Say's 20 amps..my experience with that type of switch, much over 5 amps continuous, and they tend to melt after a short lived life.

You CAN NOT control headlamps with it, and I wouldn't advise any Ignition function..without relays.

Would be OK for Audio functions, Courtesy lamps, lower current draw items without relay switching.

Doc
__________________
Aftermarket Solutions
Electronic & Electrical
Innovations
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-02-2006, 12:37 AM
Registered User
 
Last photo:
Join Date: Jan 2004
Location: Houston, TX
Age: 31
Posts: 126
Wiki Edits: 0

Thanks: 10
Thanked 0 Times in 0 Posts
How do I figure out which prong does what? Just start connecting them or something? 4 x 4 = 16 diff options right?

I want to use the switches for the following:

1) Electric Fan
2) Ignition ON (spark)
3) Fuel Pump
4) Kill Brake Lights
5) Hopefully Elec. Water Pump

I guess I need a relay for all of them except the brake lights.... Can I use only 1 relay, or do I need relays for all of them?

Thanks for the help,
sean
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-02-2006, 01:00 AM
docvette's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Rebuild an alternator Last photo:
Join Date: Mar 2004
Location: Lafayette, california
Age: 62
Posts: 7,362
Wiki Edits: 12

Thanks: 0
Thanked 6 Times in 3 Posts
Doc here,

You Didn't get a data sheet with the switches?

No markings on the back? (Switch, Lamp)

Traditionally the Center terminal of the switch is the center wiper..start there, get your DVOM out, set for ohms, R X 1 Scale , Calibrated for 000, and throw the switch the opposite direction of the end terminal on the back of the switch..

Place a probe on the center wiper, and that end terminal, and if it's a contact, It will read 000..If it's a lamp, It will read a few ohms..but not 000.

None of those functions in my opinion should be run without a relay..Fans always require them..the Ignition , depending on the type of coil, can draw up to 40 amps, Fuel pumps can draw 15 to 30 amps, brake lamps are usually fused at 20 or 25..and a water pump is over the top..

You Will need a single relay for each function. (unless you are going to design some type of interlock system..but for basics, I wouldn't )

EXAMPLE:
  • Fan Motor Manual Control


  • Fused main power into ALL the switch center wipers, (18 ga, 5 amp fuse) and lamps. 18 gauge Ground for lamp hard ground.
  • 18 gauge wire from the Normally open terminal on the switch, to the coil of the relay , 18 gauge wire for coil ground.
  • 10 Gauge wire from a Fuse link protected buss (Direct from solenoid or single battery terminal) , to the Normally open Contact of the relay,
  • 10 gauge wire to the center wiper of the relay to the Fan motor.

Just substitute the end device for "Fan motor" to wire all relays and switches..

Doc
__________________
Aftermarket Solutions
Electronic & Electrical
Innovations
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
GM/Chevy Pickup power window switches Stinkin_V8 Electrical 6 01-24-2009 09:42 PM
GM power window switches 5window Electrical 3 05-20-2005 01:06 AM
Big truck speedo dip switches propaniac Transmission - Rearend 2 02-11-2005 09:50 PM
electrical switches hvyeqpmech General Rodding Tech 1 07-13-2003 10:43 AM
Switches Silver_Camaro Electrical 2 06-29-2003 04:41 PM


All times are GMT -6. The time now is 05:56 PM.


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.