Notices
1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks
Sponsored by:
Sponsored by:

87 f150 lights again

Thread Tools
 
Search this Thread
 
  #16  
Old 04-28-2012, 12:52 PM
lmd91343's Avatar
lmd91343
lmd91343 is offline
Senior User
Join Date: Nov 2007
Location: Los Angeles, CA
Posts: 435
Likes: 0
Received 0 Likes on 0 Posts
Fordka,
Its ok. Let's move forward.

Disconnect the switch. Leave fuses in. On the harness side of the switch connector, test these wires one at a time while with the key in the off, on, and accy position. Use your test light.

Black/orange - hot key off, hot key on, hot key accy
Tan/white - hot key off, hot key on, hot key accy
Light Green/yellow - hot key off, hot key on, hot key accy
Yellow/black - fuse 11, radio - cold key off, hot key on, hot key accy

If these pass, use a DVM and check the DISCONNECTED switch using the chart I posted earlier.

I'll check back every couple of hours this weekend.

Good luck!
 
  #17  
Old 04-28-2012, 01:20 PM
lmd91343's Avatar
lmd91343
lmd91343 is offline
Senior User
Join Date: Nov 2007
Location: Los Angeles, CA
Posts: 435
Likes: 0
Received 0 Likes on 0 Posts
If those four fuse blow AFTER the switch is disconnected or the first test set does not pass, you will have narrowed down the problem's scope.

If the first test set I outlined passes, you'll have eliminated the upstream potential problems.
 
  #18  
Old 04-28-2012, 01:23 PM
fordka's Avatar
fordka
fordka is offline
Cargo Master
Thread Starter
Join Date: Jan 2012
Location: boonville ny
Posts: 2,304
Received 4 Likes on 4 Posts
2 questions. What is a DVM and what is key accy
 
  #19  
Old 04-28-2012, 04:56 PM
lmd91343's Avatar
lmd91343
lmd91343 is offline
Senior User
Join Date: Nov 2007
Location: Los Angeles, CA
Posts: 435
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by fordka
2 questions. What is a DVM and what is key accy

I'm sorry. I was not clear. There are three tests for each wire. The first with the ignition key in the off position; second with the ignition key in the on position; third with the ignition key in the accessory(ACCY) position.

A DVM is a digital volt meter. It can be used to measure dc voltage (like your test light only better) or resistence and continuity. The resistence and continuity features can be used for checking grounds, finding short circuits, and breaks in wires. They run from about $8 to about $500. A DVM for for automotive use should be in the $8 - $20 range. It should cover dc volts from 0-20vdc. There should also be a resistence feature that measures from 0 to 1000 ohms. At 0 ohms, some meters have a beeper. That is nice. Some of the older analog meters from years ago would also measure dwell and rpm.

Hopefully we can find the problem without needing one. If you buy one, don't buy it from the auto parts store. Fry's, Radio Shack and Amazon sell better meters at better prices.

I bought a cheap DVM for my son to keep in his apartment, in case he needs to fix a toaster or light. It cost only $4.37!
 
  #20  
Old 04-28-2012, 05:05 PM
lmd91343's Avatar
lmd91343
lmd91343 is offline
Senior User
Join Date: Nov 2007
Location: Los Angeles, CA
Posts: 435
Likes: 0
Received 0 Likes on 0 Posts
This is the FIRST meter I found on Amazon. I am not reccomending it. It is just the first I saw. It has everything needed for auto repair. I searched for DVM at Amazon.

Amazon.com: Equus 3320 Auto-Ranging Digital Multimeter: Automotive
 
  #21  
Old 04-28-2012, 05:05 PM
fordka's Avatar
fordka
fordka is offline
Cargo Master
Thread Starter
Join Date: Jan 2012
Location: boonville ny
Posts: 2,304
Received 4 Likes on 4 Posts
Thanks that does make sens now. I dont have a dvm just my handy test light
 
  #22  
Old 04-28-2012, 05:07 PM
fordka's Avatar
fordka
fordka is offline
Cargo Master
Thread Starter
Join Date: Jan 2012
Location: boonville ny
Posts: 2,304
Received 4 Likes on 4 Posts
Ya you can get those i think they are free at harbor freight sometimes. Is it the same thing as a multimeter
 
  #23  
Old 04-28-2012, 07:05 PM
lmd91343's Avatar
lmd91343
lmd91343 is offline
Senior User
Join Date: Nov 2007
Location: Los Angeles, CA
Posts: 435
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by fordka
Ya you can get those i think they are free at harbor freight sometimes. Is it the same thing as a multimeter
DVM multimeter are the same. Digital is sturdier and easier to read. Plus some of the digital ones beep with continuity!
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
04F150Scab
2004 - 2008 F150
8
06-06-2017 12:06 AM
03X
Excursion - King of SUVs
5
01-15-2016 10:54 AM
silver05fx4
2009 - 2014 F150
7
11-23-2009 08:08 PM
MustangMatt96GT
1994.5 - 1997 7.3L Power Stroke Diesel
6
08-06-2009 08:32 PM
CSAford
1987 - 1996 F150 & Larger F-Series Trucks
9
05-21-2009 11:47 AM



Quick Reply: 87 f150 lights again



All times are GMT -5. The time now is 05:24 PM.