Totally dead

tbr3

New Member
Jan 24, 2020
1
0
1
59
Flagstaff AZ
Hi All

I recently had my starter stick on on my 86 5.0 LX, I installed a new solenoid,ignition switch, and ignition relay in the column, now the car is totally dead with 14 volts at the battery..,cant even get headlights.. Any ideas?

Thanks for any help you can provide,

Tom
 
  • Sponsors(?)


General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
16,262
5,185
193
polk county florida
Go back to the solenoid on the fender apron, and follow the power from there, if I remember correctly the power to the lights and the ignition connect to the same post but are separate wires.
 

jrichker

StangNet's favorite TOOL
SN Certified Technician
Mar 10, 2000
27,347
2,822
234
74
Dublin GA
lowendmac.com
Hi All

I recently had my starter stick on on my 86 5.0 LX, I installed a new solenoid,ignition switch, and ignition relay in the column, now the car is totally dead with 14 volts at the battery..,cant even get headlights.. Any ideas?

Thanks for any help you can provide,

Tom
Did you put the battery cables on the wrong solenoid posts? See the diagrams below for more help.

No Crank checklist for 5.0 Mustangs

Revised 24-Oct-2013 to update voltage drop figures.

No crank, slow crank and stuck starter solenoid problems have the same root causes – low battery voltage and poor connections. For that reason, they are grouped together.
Use the same initial group of tests to find the root cause of slow crank, no crank and stuck solenoid problems.

Since some of the tests will bypass the safety interlocks, make sure that the car is in neutral and the parking brake is set. Becoming a pancake isn’t part of the repair process…


1.) Will the car start if it is jumped? Then clean battery terminals and check battery for low charge and dead cells. A good battery will measure 12-13 volts at full charge with the ignition switch in the Run position but without the engine running.
A voltmeter placed across the battery terminals should show a minimum of 9.5-10 volts when the ignition switch is turned to the Start position and the starter engages or tries to engage. Less than this will result in a clicking solenoid, or slow cranking (if it cranks at all) or a starter solenoid that sticks and welds the contacts together.

Most auto parts stores will check your battery for free. It does not have to be installed in the car to have it checked; you can carry it with you to the auto parts store.

The battery posts and inside of the battery post terminals should be scraped clean with a knife or battery post cleaner tool. This little trick will fix a surprising number of no start problems.

The clamp on with 2 bolts battery terminal ends are a known problem causer. Any place you see green on a copper wire is corrosion. Corrosion gets in the clamped joint and works its way up the wire under the insulation. Corroded connections do not conduct electricity well. Avoid them like the plague...

If the starter solenoid welds the contacts, then the starter will attempt to run anytime there is power in the battery. The cables and solenoid will get very hot, and may even start smoking. The temporary fix for a welded starter solenoid is to disconnect the battery and smack the back of the solenoid housing a sharp blow with a hammer. This may cause the contacts to unstick and work normally for a while.


A voltmeter is handy if you are familiar with how to use it to find bad connections. Measure the voltage drop across a connection while trying to start the car: more than .25 volts across a connection indicates a problem. The voltage drop tests need to be done while cranking the engine. It's the current flowing through a connection or wire that causes the voltage drop.

See http://assets.fluke.com/appnotes/automotive/beatbook.pdf for help for help troubleshooting voltage drops across connections and components. .



Voltage drops should not exceed the following:
200 mV Wire or cable
300 mV Switch or solenoid
100 mV Ground
0.0V Connections
A voltage drop lower that spec is always acceptable.

2.) Check the battery to engine block ground down near the oil filter, and the ground behind the engine to the firewall. All grounds should be clean and shiny. Use some sandpaper to clean them up.

3.) Jump the big terminals on the starter solenoid next to the battery with a screwdriver - watch out for the sparks! If the engine cranks, the starter and power wiring is good. The starter relay is also known as a starter solenoid.

The rest of the tech note only concerns no crank problems. If your problem was a stuck solenoid, go back to step 1.

4.) Then pull the small push on connector (small red/blue wire) off the starter solenoid (Looks like it is stuck on a screw). Then jump between the screw and the terminal that is connected to the battery. If it cranks, the relay is good and your problem is in the rest of the circuit.

5.) Remember to check the ignition switch, neutral safety switch on auto trans and the clutch safety switch on manual trans cars. If they are good, then you have wiring problems.

Typical start circuit...
Diagram courtesy of Tmoss & Stang&2birds


6.) Pull the starter and take it to AutoZone or Pep Boys and have them test it. Starter fails test, then replace it. If you got this far, the starter is probably bad.


Starter solenoid wiring for 86-91 Mustang



Starter solenoid wiring 92-93 Mustang or earlier Mustang with upgraded high torque mini starter.
[


Electrical checks for the switches and starter solenoid

Remove the small red/blue wire from the starter solenoid. Use a screwdriver to bridge the connection from the battery positive connection on the starter solenoid to the small screw where the red/blue wire was connected. The starter should crank the engine. If it does not, the starter solenoid is defective or the battery lacks sufficient charge to crank the engine.

If the starter does crank the engine, the problem is in the clutch safety circuit (5 speed) or Neutral Sense Switch (auto trans) or ignition switch.


See the Typical start circuit diagram above for wiring information for troubleshooting.

You will need a voltmeter or test lamp for the rest of the checks. Connect one lead of the voltmeter or test lamp to ground. The other lead will connect to the item under test.
Look for 12 volts on the white/pink wire when the ignition switch is turned to the Start position. Check the ignition switch first.
No 12 volts, replace the ignition switch.

The next step will require you to push the clutch pedal to the floor (5 speed) or put the transmission in neutral (auto trans) while the ignition switch is turned to the Start position.
Good 12 volts, check the clutch safety switch (5 speed) or Neutral Sense Switch (auto trans) for good 12 volts on both sides of the switches. No 12 volts on both sides of the switch and the switches are defective or out of adjustment. Check the wiring for bad connections while you are at it.
 
  • Informative
Reactions: General karthief
Thread starter Similar threads Forum Replies Date
P Info for 05-09 Mustang GT owners who have experienced total power loss (dead stalls) after 1-2 hours of hwy driving 2005 - 2014 S-197 Mustang -General/Talk- 1
blown65 Not totally dead Classic Mustang Specific Tech 5
I I'm trying to replace my rear shocks and the hardware is totally rusted! Fox 5.0 Mustang Tech 0
N Help is my mustang totaled 2015+ (S550) Mustang -General/Talk 12
Justin87 Paint and Body A Total Idiots Guide To Buffing 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 16
YadiStang Total Timing Mystery 1969 Mustang 302 1965 - 1973 Classic Mustangs -General/Talk- 8
KyleEBK Cars A Total Mutt. What The Hell Battery Tray Should I Order?. Pics Fox 5.0 Mustang Tech 5
T Anyone Recognize This 2013 Gray W/green Emblem Mustang That Was Totaled? 2010 - 2014 Specific Tech 1
S Rear-ended Someone In My 2006 V6 Manual Transmission Mustang, Totaled? 2005 - 2014 S-197 Mustang -General/Talk- 4
LaserSVT Total Liar Bs's About His Custom Subwoofers. Mustang Sound & Shine All 6
hoopty5.0 The Totally Awesome Adventures Of Boosted And Hoopty 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 25
cervinigt Is It Totaled? 2005 - 2009 Specific Tech 2
De-Marko Totally Stumped! Fox 5.0 Mustang Tech 4
gtthomas Supercharged Gt Totaled... Now What? 1996 - 2004 SN95 Mustang -General/Talk- 11
94GTCoupe SN95 94 Gt Totalled By Drunk Driver/ins Q's/prepare Me For The Worst. 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 50
6 SOLD Total Control Products / Krc Power Steering Pump Kit For 351 Cleveland / 400m Ford Engine and Power Adder 2
atey950 My 93 Reef Gt Is Totaled. R.i.p. 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 38
Total Control Products Total Control Products Is On Facebook! Classic Mustang Specific Tech 0
mantix33 totally torn 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 18
tca7291 Totalled My Car... 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 15
Riot Accident / potentially "Totaled" SN95 4.6L Mustang Tech 11
Gtwo Totaled my stang today:( 1996 - 2004 SN95 Mustang -General/Talk- 67
MileHighDart Turns out my "totally stock" Notch is not quite as stock as I thought 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 26
TOOLOW91 Fox is totaled hit head on 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 20
65fastbackresto Totally off topic, but need advice before I do this Classic Mustang Specific Tech 3
87GT Drop Top 87 Mustang GT vert just finished total restore w/Fordstrokers 347 Fox Body Mustangs For Sale (1979-93) 4
R Summit brand piston rings top gap totally off coming in at .028!!! Fox 5.0 Mustang Tech 11
H totally build 2002 GT vert SN95 Mustangs For Sale (1994-04) 0
Wicked65 Total timing Classic Mustang Specific Tech 5
CBus 06 GT How many miles on your S197, total and yearly 2005 - 2009 Specific Tech 59
H May have totalled my car 1996 - 2004 SN95 Mustang -General/Talk- 41
C Mustangs 101 - Totally basic question 1996 - 2004 SN95 Mustang -General/Talk- 9
Venom351R Totaled my truck today 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 73
281pony Totally baffled. Car has a miss/dies when going in reverse. Fox 5.0 Mustang Tech 14
C Totally stumped - Help is GREATLY appreciated Fox 5.0 Mustang Tech 9
scupking Stang is most likely going to be totaled 1996 - 2004 SN95 Mustang -General/Talk- 29
F Another Transmission Leak (totally stumped) Fox 5.0 Mustang Tech 6
F Total Control for '65-'66 Mustang Suspension 5
Kdubslugga I need help seriously, Im totally lost!! Fox 5.0 Mustang Tech 2
9 Unhappy, HDX total crap 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 43
O Total Control manual rack '69-'70 Suspension 2
B total weight of 68 coupe? Classic Mustang Specific Tech 7
SDaygo Mach 1 Total Control Big Block P0wer Rack Suspension 1
SDaygo Mach 1 Total Control Front Suspension Suspension 2
Shaun1212 Fastest Totally Stock Engine Fox 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 19
CobraRed_96_GT Stang's Totaled - Goodbye to CobraRed's SN95 1996 - 2004 SN95 Mustang -General/Talk- 84
S Mach 1 Totaled 1996 - 2004 SN95 Mustang -General/Talk- 30
VF143Falcon Totaled? 2005 - 2014 S-197 Mustang -General/Talk- 29
68converted Am I just stupid? I think I may have totally screwed up Fox 5.0 Mustang Tech 2
93tealstang Looking At A Capri After Fox Is Totalled.... 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 38
Similar threads