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Where is the starter relay on a 1997 Lincoln Town Car


Starter Interrupt Relay C204
Behind RF side of I/P, near air bag diagnostic module


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  • Engine Does Not Crank
  • Low battery.
  • Open fuse.
  • Open ignition switch.
  • Shorts to ground.
  • Engine system.
  • Inoperative starter motor.
  • Starter interrupt relay (if incorporated).
  • High resistance in battery feed to starter solenoid B+ or S terminals or ground circuit.
  • GO to Pinpoint Test B .

May 28, 2017 | Lincoln Cars & Trucks

1 Answer

O5 Colorado got the ecm code when I shut off the truck and now it won't turn over


What ECM code ? What is everything else that is working ? Headlamps , inside lighting , radio etc... When you turn the key on do the instrument cluster warning lights come on then off a few seconds later ? Anti-theft (security light ) On ? Flashing ? Do you know what all is involved ,or happens when you turn the key to start ?
Circuit Description (ECM/PCM Controlled)
Moving the ignition switch to the START position sends a 12-volt signal to the engine control module (ECM)/powertrain control module (PCM) Crank Request circuit. The ECM/PCM verifies that the transmission is in the PARK or NEUTRAL position. With the transmission in Park, voltage flows through the Park/Neutral position switch and feeds the starter relay coil. The PCM then grounds the control circuit of the starter relay. When the starter relay is energized it allows battery positive voltage to the starter solenoid S terminal. On some vehicles the starter will continue to crank the engine with the key released until it starts or the crank command has timed out to prevent excessive heat build up in the starter circuitry or the ECM/PCM receives an engine run flag.
Circuit Description (BCM Controlled)
Moving the ignition to the START position signals the body control module (BCM) that engine crank has been requested. The BCM verifies that theft is not active and sends a serial data message to the powertrain control module (PCM) requesting engine start. The BCM also energizes the RUN/CRANK RELAY. When the RUN/CRANK RELAY switch side closes, and the vehicle is in Park or Neutral or with the clutch is fully depressed, if equipped, supplies voltage to the starter relay coil. The PCM verifies the transmission is in Park or Neutral and the clutch is fully depressed, if equipped. The PCM will then ground the control circuit of the starter relay, closing the switch supplying voltage to the starter solenoid. On some vehicles the starter will continue to crank the engine with the key released until it starts of the crank command has timed out to prevent excessive heat build up in the starter circuitry or the PCM receives an engine run flag.


Verify that no starter relay, immobilizer, or automatic transmission DTCs are set that would cause the PCM to disable starting.
? If the specified DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
Ignition ON, observe the scan tool PCM Ignition 1 Signal parameter with a scan tool. The reading should be greater than 10.0 Volts.
? If less than the specified value, test the ETC, PCM 1, and PCM B fuses, the RUN/CRNK relay, and the PCM ignition voltage circuits for an open/high resistance. If the circuits test normal, replace the PCM.
Ignition OFF, remove the START relay.
Verify that a test lamp illuminates between the B+ circuit terminal 30 and ground.
? If the test lamp does not illuminate, test the START fuse and the B+ circuit for an open/high resistance.
Ignition ON, transmission in Park or clutch pedal pressed, verify that a test lamp illuminates between the PNP/clutch start switch signal circuit terminal 86 and ground.
? If the test lamp does not illuminate, test the IGN fuse, RUN/CRANK relay, PNP/clutch switch ignition voltage circuit, and the signal circuit for a short to ground or an open/high resistance. If the circuits test normal, test or replace the PNP switch or the clutch start switch.
Connect a test lamp between the park/neutral signal circuit terminal 86 and the relay coil control circuit terminal 85.
Ignition ON, transmission in Park, or clutch pedal pressed, turn the ignition switch between the START and RUN positions. The test lamp should turn ON and OFF when changing between the commanded states.
? If the test lamp is always ON, test the relay control circuit for a short to ground. If the circuit tests normal, replace the PCM.
? If the test lamp is always OFF, test the relay control circuit for a short to voltage or an open/high resistance. Test the PNP/clutch start switch signal circuit for an open/high resistance. If the circuits test normal, replace the PCM.
Install the START relay.
Connect a test lamp between the starter solenoid terminal and ground.

Mar 12, 2017 | Cars & Trucks

1 Answer

Where is the fuel pump relay on 1992 Toyota 4 runner


engine bay cluster
the cover has the legend

if fuel relay is ok ...could be this relay
Circuit Opening Relay
Circuit opening relay controls fuel pump circuit. The Engine Control Module (ECM) receives an input signal at STA terminal when engine is cranking. Starter signal is also applied to terminal STA of circuit opening relay.
Starter signal energizes circuit opening relay during cranking. Circuit opening relay then provides voltage to fuel pump or fuel pump relay.
Fuel pump switch in airflow meter provides ground for circuit opening relay.
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Oct 26, 2016 | Toyota Cars & Trucks

1 Answer

Can a bad starter relay burn out a starter


st people are familiar with fuses - they allow your car's electronics to work while protecting them from over-voltage situations. Relays are similar, but much larger and more powerful. There's a relay for most of the major components on your car, including the fuel pump, the air conditioner compressor and the starter.
Your starter relay is engaged every time you turn the ignition to run. Voltage is sent through the relay and if it has failed, it stops there. With a dead relay, the starter won't work and your engine won't crank. The relay is subjected to very high voltage when you turn the ignition, and this will eventually cause the contact circuit to burn out. It's also possible for the relay's energizing circuit to fail.
n terms of lifespan, your starter relay should last a very long time. Many drivers never have to replace theirs, but this isn't true across the board. Relays can and do fail at any point, including when the car is new. With that being said, starter motor failure is actually more common than a failed relay, and other problems can present similar symptoms, including a dead or dying car battery. f the starter relay fails, it's the same as if your starter motor fails in terms of what you can expect - you'll be stuck where you are until the relay can be replaced. However, there are signs and symptoms that can warn you of an impending failure and knowing these might save you some serious hassle. They include:
  • Starter will not engage at all
  • Starter stays engaged (creating a grinding noise)
  • Starter only works intermittently (usually when the engine is cold

Sep 29, 2016 | Cars & Trucks

1 Answer

I havever a Pontiac Bonneville SSEI 2001, I want to replace the neutral safety switch but I can't find it. Is this where it should be?


Before you replace a part you don't need ! Are you familiar with how the starting system works on this vehicle . Did you test with a scan tool or even a voltmeter to see if the PCM is receiving voltage through the Park neutral safety switch . You can't find it because it is inside the transmission. An it is called Transmission Internal Mode Switch .
Moving the ignition switch to the START position sends a 12 V signal to the PCM Ignition Crank Sense. The PCM verifies that the transmission is in the PARK or NEUTRAL position. The PCM then grounds the control circuit of the START relay. When the START relay is energized it allows battery positive voltage to the starter solenoid S terminal.
Starter Solenoid Does Not Click
2
Turn the ignition switch to the START position.
Does the engine crank?
YES - Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
NO - Go to Step 3

3
Is the security indicator flashing?
YES - Go to Diagnostic System Check - Theft Deterrent in Theft Deterrent
NO - Go to Step 4

4
Install a scan tool.
Turn ON the ignition, with the engine OFF.
With a scan tool, observe the Starter Relay Command parameter in the PCM data list.
Turn the ignition switch to the START position.
Does the scan tool display Yes?
YES - Go to Step 6
NO - Go to Step 5

5
Turn ON the ignition, with the engine OFF.
Verify that the transmission is in Park or Neutral.
With a scan tool, observe the IMS parameter in the Transmission data list.
Does the scan tool display Park or Neutral?
YES - Go to Step 12
NO - Go to Transmission Internal Mode Switch Logic in Automatic Transaxle - 4T65- E
6
Turn the ignition switch to the START position.
Do you hear the STARTER relay click?
YES - Go to Step 9
No - Go to Step 7

7
Turn OFF the ignition.
Disconnect the STARTER relay.
Turn ON the ignition, with the engine OFF.
Connect a test lamp between the battery positive voltage circuit of the STARTER relay coil and a good ground.
Does the test lamp illuminate?
YES - Go to Step 8
NO - Go to Step 20

8
Connect a test lamp between the battery positive voltage circuit of the STARTER relay coil and the control circuit of the STARTER relay.
Turn the ignition to the START position.
Does the test lamp illuminate?
YES - Go to Step 16
NO - Go to Step 14
9
Turn OFF the ignition.
Disconnect the STARTER relay.
Connect a test lamp between the battery positive voltage circuit of the STARTER relay switch and a good ground.
Does the test lamp illuminate?
YES - Go to Step 10
NO - Go to Step 21

10
Connect a 30 amp fused jumper between the battery positive voltage circuit of the STARTER relay switch and the starter solenoid crank voltage circuit.
Does the engine crank?
YES - Go to Step 16
NO - Go to Step 11

11
Does the fuse in the jumper open?
YES - Go to Step 22
NO - Go to Step 13

12
Turn OFF the ignition.
Disconnect the PCM harness connector.
Connect a test lamp between the crank request input circuit of the PCM and a good ground.
Turn the ignition to the START position.
Does the test lamp illuminate?
YES - Go to Step 19
NO - Go to Step 15

13
Test the starter solenoid crank voltage circuit for a high resistance or open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
YES - Go to Step 27
NO - Go to Step 17
13
Test the starter solenoid crank voltage circuit for a high resistance or open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 27
Go to Step 17

14
Test the control circuit of the STARTER relay for an open or short to battery voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
YES - Go to Step 27
NO - Go to Step 19

15
Test the crank voltage circuit of the PCM for a high resistance or open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
YES - Go to Step 27
NO - Go to Step 18

16
Inspect for poor connections at the STARTER relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
YES - Go to Step 27
NO - Go to Step 23

17
Inspect for poor connections at the starter solenoid. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
YES - Go to Step 27
NO - Go to Step 24

18
Inspect for poor connections at the ignition switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
YES - Go to Step 27
NO - Go to Step 25

19
Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 27
Go to Step 26

20
Repair an open or high resistance in the battery positive voltage circuit of the STARTER relay coil. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?
Go to Step 27
--

21
Repair the open or high resistance in the battery positive voltage circuit of the STARTER relay switch. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?
Go to Step 27
--

22
Repair the short to ground in the starter solenoid crank voltage circuit. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?
Go to Step 27
--

23
Replace the STARTER relay.
Did you complete the replacement?
Go to Step 27
--

24
Replace the Starter Motor. Refer to Starter Motor Replacement .
Did you complete the replacement?
Go to Step 27
--

25
Replace the ignition switch. Refer to Ignition and Start Switch Replacement in Instrument Panel Gauges and Console.
Did you complete the replacement?
Go to Step 27
--

26
Important:: Perform the set up procedures for the PCM. Refer to Powertrain Control Module Programming in Engine Controls - 3.8L.
Replace the PCM. Refer to Powertrain Control Module Replacement in Engine Controls - 3.8L.
Did you complete the replacement?
Go to Step 27
--

27
Operate the system in order to verify the repair.
Did you correct the condition?
System OK
Go to Step 2

Jun 30, 2016 | Pontiac Cars & Trucks

1 Answer

Car wont start have replaced starter motor and relay and igniyion switch still wont start


What is year--make--model?
Make sure battery has a full charge and battery connections are all good. If your saying starter motor won't crank, check voltage and ground at the starter motor. Usually two voltage circuits at the starter, one comes from the battery, hot all the time. The other circuit goes hot with key in the crank position and in your case, I suppose wired through the starter relay. The relay has two circuits, the load side and control side of relay. The control side of relay needs voltage and ground to energize the relay. The load side of relay, in a diagram shows a line with arrowhead, when relay is energized, that arrowhead line moves to other terminal and that circuit carries voltage to starter. The voltage for load side of relay is usually hot all the time. I can't rule out neutral or clutch switch. The starter motor usually grounds through the engine block. If all voltage and ground circuit for the starter are good, I'd have to make sure the engine isn't seized.
Any testing at the starter, make sure tranny is in park or neutral and functional parking brake is set.

Mar 06, 2016 | Cars & Trucks

2 Answers

Starting issues


where do i find the fuse to cigarette lighter on 2010 ford fusion

Dec 25, 2013 | 1995 Nissan Pathfinder

1 Answer

Where is the starter relay on a 1990 Camry with 2.0L 4-cylinder and automatic transmission?


There is no starter relay on the 1990 camry 4cyl . If you check the fuse panel by the drivers left ankle you will see that there is a socket for a relay but it is missing. On the manual transmission cars it has a relay in that socket. The black and white wire goes directly through the neutral safety switch to the ignition switch.
You can see that same wire on the plug in connection of the starter. If you are having intermittent cranking it is probably high resistance in that circuit, If you are handy just install a relay before the starter connection and have the black and white wire just power your relay coil. The new relay must then be connected to the battery plus and the out put to the plug in wire you cut to install the new relay.

Aug 23, 2012 | 1990 Toyota Camry

2 Answers

My 2004 Ford Explorer won't start and we have changed the started on it already. It is getting power because all of the lights on the dash come on when you turn the ignition


Your saying you have crank no start correct? Are you getting B+ to the starter solenoid? If your not getting B+ to the starter then its the starter relay, aka starter interrupt relay , neutral start , high resistance in starter circuit (wiring)or a weak battery.
These are all the items in the starting circuit.

Aug 11, 2010 | 2004 Ford Explorer

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