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Old lucas 4 pin relay of a car horn, what does C1, C2, W1 and W2 wire to?

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if you check the wire that comes from the horn button to the relay for voltage when the horn is pushed and have voltage then you have a bad relay,if not then you probably have bad contacts in the horn pad area or even the clock spring itself.

Posted on Mar 18, 2011

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1 Answer

Where is the location of 06 Saturn Ion 2 compressor relay?


Connector 1:
Fuse Block - Underhood Label (2.2L, 2.4L)
Connector 2:
Fuse Block - Underhood Top View (2.2L, 2.4L)
Connector 3:
Fuse Block - Underhood Bottom View (2.2L, 2.4L)
Connector 4:
Fuse Block - Underhood C1 (2.2L, 2.4L)
Connector 5:
Fuse Block - Underhood C2 (2.2L, 2.4L)
Connector 6:
Fuse Block - Underhood C3 (2.2L, 2.4L)
Connector 7:
Fuse Block - Underhood Label (2.0L)
Connector 8:
Fuse Block - Underhood Top View (2.0L)
Connector 9:
Fuse Block - Underhood Bottom View (2.0L)
Connector 10:
Fuse Block - Underhood C1 (2.0L)
Connector 11:
Fuse Block - Underhood C2 (2.0L)
Connector 12:
Fuse Block - Underhood C3 (2.0L)
Connector 13:
Body Control Module (BCM) Label
Connector 14:
Body Control Module (BCM) Top View
Connector 15:
Body Control Module (BCM) Bottom View
Connector 16:
Body Control Module (BCM) C1
Connector 17:
Body Control Module (BCM) C2
Connector 18:
Body Control Module (BCM) C3
Connector 19:
Body Control Module (BCM) C4
Connector 20:
Body Control Module (BCM) C5 (UE1)
Fuse Block - Underhood Label (2.2L, 2.4L)
2.2L

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2.4L

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Fuse Block - Underhood Label Usage (2.2L, 2.4L)
No.

Device

Rating

Description
1

ECM (2.4L)/TCM Fuse
10A

ECM (2.4L)/TCM
2-3

--
--

Not Used
4

RH HDLP Fuse
15A

Headlamp - Right
5

A/C Fuse
10A

A/C CLUTCH Relay
6-7

--
--

Not Used
8

ABS Fuse
10A

EBCM (JM4)
9

ECM/ETC Fuse
15A

ECM
10

EMISS Fuse
15A

EVAP Canister Purge Solenoid, Coolant Level Switch, MAF Sensor, HO2S 1, and HO2S 2
11
IGN Fuse
10A
ICM and PNP Switch (A/T)
12
--
--
Not Used
13
TRANS2 Fuse
10A
ECM, Automatic Transmission
14
TRANS1 Fuse
10A
TCM (MN5)
15
BACK UP Fuse
10A
PNP Switch (A/T) or Backup Lamp Switch (M/T)
16
INJECTORS Fuse
10A
Fuel Injectors 1-4
17
FOG LP Fuse
10A
FOG LAMP Relay (T37)
FOG LP Fuse
15A
FOG LAMP Relay (T96)
18
LH HDLP Fuse
15A
Headlamp - Left
19
WIPER Fuse
25A
WIPER 1 Relay
20
HORN Fuse
10A
HORN Relay
21
RADIO Fuse
20A
Audio Amplifier (UZ6)
22
ABS Fuse
20A
EBCM (JM4)
23
RR DEFOG Fuse
30A
REAR DEFOG Relay
24
A/C CLUTCH Relay
--
A/C Compressor Clutch

Jul 17, 2015 | 2006 Saturn ION 2

1 Answer

I have a Chevrolet Cavalier year 2000, 2.2 OHV engine. I have to splice 38 broken wires that run to the PCM. I have found two purple wires and I do not know which ones I have to join. I need to have t


Hey Hugo, found this info. purple wire. I hope you don't need help with all 38 wires? autozone.com has free wiring diagrams, just register your vehicle and click on vehicle repair guides, find the link for wiring.
C1 is blue connector, c2 is black connector
c1-35 goes to brake switch
c2-61 goes to vss, vehicle speed sensor
c1-59 goes to datalink connector
c2-22 goes to pre converter 02 sensor

Jan 14, 2015 | Chevrolet Cars & Trucks

1 Answer

Horn not functioning


got 12vdc across horn connector pins , honking
1; yes, bad horn
2, no? bad wires, bad relay ,bad horn fuse, bad horn switch./

got a voltmeter, $10 at walfart? bingo, no more guessing.

Aug 12, 2014 | 2012 Suzuki SX4 SportBack 4dr Hatchback...

1 Answer

Why won't my horn work on my 1991 jeep cherokee laredo?


the horn is simple , a horn a relay and switch, and fuse 15?.

but is complex by other factors.

1: the clock spring . no air bags in 1991, so very easy.



there are 2 ways to diagnose any horn..

1: hot wire it, does it now honk? if yes, hot wire the relay does it honk now?

2: or use any voltmeter ever made and find out why.



#2 is the save way.



id hot wire the horn and make sure that 1991 ground bolt

mount is really still at ground potential. id bet that bolt has

long sense rusted, and is useless, like most are by now.



the fuse and relay are both in the PDC

the PDC means, engine bay fuse box in gringo. (non jargon)

http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service

here is 93 for free.

see horn page one and the 2 tests.

or see the schematic.

at there, see the fuse box see fuse 15 (PDC 15?)

same chapter, see PDF page 90 (sheet33)



as you can see if the fuse is good.

12vdc arrives at the Horn relay on 2 pins.

if the horn switch works the relay ENERGIZES (closes)

and 12vdc arrives at the horn, and it honks

if while honking, the horn casing is 12vdc,

then means the horn is no longer grounded, a common happenstance.



if the relay dont energize check the horn ring contacts or connectors to it for continuity.

the relay can be tested, in the car.

like this.

honking

pin 2 and 5 are 12v

pin 1 = 0 volts

pin 4 is 12v, if 0v the relay is bad.



easy huh., ?

May 14, 2014 | 1991 Jeep Cherokee Briarwood

1 Answer

Alarm horn will not turn off


do you have the alarm option, factory?
there are 2 horns
and 1 horn relay.
if the horn relay is energized, then the inputs to it are bad.
bad input is the horn relay has 12v across is coil pins, all the time.
so unplug the horn wires. silence.
then check relay , now that its quiet. is the coil hot?
hot means 12vdc across it. not thermal hot.
the relay on the 97 can be active for 2 reasons.
1: horn button stuck on, so pull that wire.Gray-org, at column
2: BCM is active same color, C2 in 13 is 0volts. (active)
if the BCM is honking the horn, we ask why, and that be alarm.
im reading at alldata.com so can you , under antithieft alarm sections.
if the alarm is activated, (is it) and any door switch is open, the horn honks.
if the gray-org. wires is at 12vdc , then the relay is bad
shorted, main contacts inside.
if the wire is 0v, its wrong.
ill stop, and wait until you find which it is, bad relay, bad horn button
or bad BCM or bad input to BCM.

Dec 04, 2013 | 1997 Jeep Grand Cherokee

1 Answer

1996 jeep cherokeecranks no spark on coil or distributer


Test procedure:


1. Test powers and grounds at the Powertrain Control Module (PCM) on the C1 connector. Pins 2 and 22 are power, then check pins 31 and 32 for ground.

2. Next, test the 5 volt power supplies at pin 17 of the C1 connector and pin 31 of the C2 or middle connector for shorts to ground. Sensors on the circuit are the Camshaft Position (CMP) sensor, Crankshaft Position (CKP) sensor, Throttle Position Sensor (TPS), Manifold Absolute Pressure (MAP) sensor and Vehicle Speed Sensor (VSS).

3. Unplug the sensors on the 5 volt power supply, one at a time, while monitoring the 5 volt supply.

4. When the shorted sensor is unplugged, the PCM will wake up and scan tool communication will return.

5. The wiring harness could also be shorted to ground on one of the 5 volt power supply wires. Cut the wires at the PCM on pins C1-17 and just unplug the center connector. Then check for the 5 volts on the PCM of the connector or checking for any continuity to ground with the sensors unplugged at the PCM connector on C1-17 and C2-31 to check the wiring harness

Nov 16, 2013 | Cars & Trucks

1 Answer

Kleinn air horn 6126/6127/ddi air horn and compressor package problems


Im having the same issue with my 6127, I wired it all accordly to the instructions and the horn is constant. Using the relay supplied, connectin pin 1 to 3 and 3 to constant 12v. Connect 2 to horn wire and 4 to + on the compressor. Negative on compressor to ground, and horn goes off? Not sure what to do

Aug 17, 2013 | Cars & Trucks

1 Answer

What wire ( yellow or blue ) powers the horn on a 1981 Ford F-150


The horn button supplies a ground to the horn relay.Start by pulling the plug at the base of the column,see if you can get a ground on one of the pins from the column when you pus the button.Or find the horn relay,and do the same test from there.You should find 12v on one on the relay socket pins,a ground on one(this will be the wire to the horn)and a ground on the 3rd pin when you press the horn button.

Jan 02, 2012 | 1981 Ford F 150

1 Answer

WHAT KIND OF RELAY SWITCH DO WE USED WHEN THE OLD RELAY SWITCH FOR MITSUBISHI LANCER EL 1994 BEEN BUSTED? hOW MANY TERMINAL DO WE USED?


Hi,
The original relay should be use.
Normally relay got a 4 pin and a 5 pin, but they work same, the difference is the amperage. Horn relay got high amp as the headlight, so it depends where you going to use it.
A replacement relay should be bought with a socket and wire.
Hope Fixya helps you out!

Aug 15, 2011 | Mitsubishi Lancer Cars & Trucks

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