Neutral safety switch - Ford Mustang Forum
 
LinkBack Thread Tools
post #1 of 9 (permalink) Old 12-31-2013 Thread Starter
Rookie
 
Supertrkasg's Avatar
 
Joined: Dec 2013
Location: Bakersfield
Posts: 5
 
Neutral safety switch

My back up lights dont work so i put new back up light housing and bulbs still wont turn on so i replaced all my fuses still no back up lights i put new neutral safety switch still no back up lights car turns on fine in park and neutral just no backup lights i also put car on accessory and put in reverse test lighted the plug on neutral safety switch no juice so is there a certain way to adjust new switch i installed even though car starts fine in park and neutral anybody have ideas on what else i can do.

1968 302 c-4 tranny
Supertrkasg is offline  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old 01-01-2014
PONY Member
 
Charles Reeves's Avatar
 
Joined: Sep 2010
Location: Knoxville
Posts: 616
 
If you have no power at the switch, I'm wondering if the fuse is blown. It is not uncommon for someone to put the wrong bulb(s) in the sockets. I don't recall the bulb numbers, but the correct bulb has two terminals on the bottom. If you put one in that just has one terminal it will short across the two socket terminals and blow the fuse. I can get more info, but suspect other responders will supply it.
Charles Reeves is offline  
post #3 of 9 (permalink) Old 01-01-2014 Thread Starter
Rookie
 
Supertrkasg's Avatar
 
Joined: Dec 2013
Location: Bakersfield
Posts: 5
 
I checked the bulbs are new and correct and all my fuses are good is there suppose to b power at harness on firewall when car is in reverse because theres not can adjusting switch make power turn on, cuase car turns on in park and neutral just no power at harness when in reverse.
Supertrkasg is offline  
post #4 of 9 (permalink) Old 01-01-2014 Thread Starter
Rookie
 
Supertrkasg's Avatar
 
Joined: Dec 2013
Location: Bakersfield
Posts: 5
 
Question if 1 back up housing say is bad would that cause the other side to not work as well. Or are they independent .
Supertrkasg is offline  
post #5 of 9 (permalink) Old 01-01-2014
SHELBY GT 350 Member
Classic Member
 
Veronica's Avatar
 
Joined: Dec 2003
Location: Houston
Posts: 8,954
     
Hello. The two back up light housings work independent of each other. You can unplug the neutral safety switch at the firewall and check with a volt meter to see if one of the black wires with a red stripe is showing power with the key in the 'On' position. If yes, and there are no obvious problems with wires going to the neutral safety switch, like maybe they are melted and stuck to the exhaust, then I would connect one of the black/red wires, turn the key on, put the car in reverse and see if the other black/red wire showed power. If no, you need a new switch. If yes, there is probably a short in the black/red wire that winds it's way back to the trunk area.
Veronica is offline  
post #6 of 9 (permalink) Old 01-01-2014 Thread Starter
Rookie
 
Supertrkasg's Avatar
 
Joined: Dec 2013
Location: Bakersfield
Posts: 5
 
I put car on and in reverse no power at plug that connects to firewall this switch is brand new i literally recieved it monday and installed it yesterday car turns on fine.
Supertrkasg is offline  
post #7 of 9 (permalink) Old 01-01-2014
SHELBY GT 350 Member
Classic Member
 
Veronica's Avatar
 
Joined: Dec 2003
Location: Houston
Posts: 8,954
     
Hi again. This means that your problem is behind the dash, which will require pulling the instrument cluster out. That is whole lot easier to do if you move the heater controls out enough to get your hand back there to disconnect the speedometer cable. If the fuse shows that it is in fact getting power and is not blown, then the problem is between the fuse and the firewall. You'll have to go point to point in steps until you find the break in the flow.
Veronica is offline  
post #8 of 9 (permalink) Old 01-01-2014 Thread Starter
Rookie
 
Supertrkasg's Avatar
 
Joined: Dec 2013
Location: Bakersfield
Posts: 5
 
Any idea where wires go to from firewall to under dash?
Supertrkasg is offline  
post #9 of 9 (permalink) Old 01-01-2014
SHELBY GT 350 Member
Classic Member
 
Veronica's Avatar
 
Joined: Dec 2003
Location: Houston
Posts: 8,954
     
Hi again. On your car there should be a red wire coming out of the back of the fuse box from the accessory fuse. If you follow that wire for about 16 inches or so, you'll see one of those big black splice thingies that Ford loved so dearly. Not counting the red wire, there should be 5 other wires coming out of that splice. One of those is black with a red stripe. That one goes through the firewall and is plugged into the neutral safety switch harness. Another black/red wire comes from the neutral safety switch harness, comes back through the firewall, returning to the underdash area, goes a pretty good ways and terminates at a clear plastic two-prong female connector. On the other prong there will be two wires going into it, but, the single wire at that connector is the black/red wire that then goes to the trunk area. Power goes from the accessory fuse to that splice thingy, through the firewall to the neutral safety switch, back through the firewall to the two prong connector, and then back to the lights.

Assuming once again that the fuse is getting power, and that it is not blown, so that power is actually leaving the fuse box along that red wire, my first guess at where the problem is would be that splice. The good news is that there is less than 3 feet of wire between the fuse box and the firewall connector, but, the bad news is that most of it is wrapped with a bunch of other stuff and you can't find it without unwrapping a little bit of the harness, and space is not exactly abundant in there.
Veronica is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford 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, otherwise you will not receive the necessary confirmation email needed to confirm, validate and activate your new AFM member account.

Failure to provide a VALID email address, will result in the cancellation of your new AFM member account registration.

Email Address:
OR

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.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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 Off
Pingbacks are Off
Refbacks are On

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


1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183