• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

20 amp ign. switched circuit in a 89 ranger.


jmcleek

New Member
Joined
Jun 9, 2009
Messages
249
Reaction score
0
Points
0
Vehicle Year
1988
Make / Model
ford
Transmission
Automatic
I need to find , or make a 20 amp circuit that is turned on/ off by the ignition switch. is there a good place to tap in for this power source inside the cab?
 


RonD

Official TRS AI
TRS Technical Advisor
Joined
Jun 2, 2012
Messages
25,292
Reaction score
8,298
Points
113
Location
canada
Vehicle Year
1994
Make / Model
Ford
Transmission
Manual
You won't find a 20amp open circuit in a car or truck, passenger compartment, it will need to come from the battery or in an '89 from the starter relay post(where battery is connected)

And you need to use a Relay, they are inexpensive and very simple to hook up.

Socket is about $4, 12volt 40amp relay is about $6.

Relay's draw about .5amp, half an amp, so you can tie it into any Key On circuit without "blowing" anything.

Then run a 16 gauge wire with 20amp fuse, from battery to Relay, then wire from relay to Device to be powered.

All automotive relays use the same "numbering" for the connections

Most automotive relays have 5 "posts" you only need 4
30 and 87 are the Load
85 and 86 are the activation coil
87a is unneeded, unused if it has that one

battery--------20amp fuse--------(30)relay(87)-----------------Device
Key on wire------------------------(85)relay(86)-----------------ground
 
Last edited:

jmcleek

New Member
Joined
Jun 9, 2009
Messages
249
Reaction score
0
Points
0
Vehicle Year
1988
Make / Model
ford
Transmission
Automatic
thanks Ron ,I didn't think I was going to be able to tie in to any thing ,that is the way I will go.
 

Sponsored Ad


Sponsored Ad

Staff online

Today's birthdays

Member & Vendor Upgrades

For a small yearly donation, you can support this forum and receive a 'Supporting Member' banner, or become a 'Supporting Vendor' and promote your products here. Click the banner to find out how.

Truck of The Month


Kirby N.
March Truck of The Month

Recently Featured

Want to see your truck here? Share your photos and details in the forum.

Follow TRS On Instagram

TRS Events

25th Anniversary Sponsors

Check Out The TRS Store


Sponsored Ad


Sponsored Ad

Sponsored Ad


Amazon Deals

Top