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Kella 4RA 965.400-001 relay

How do i connect this device?

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I have 2000 impala.. Code 0481 I've replaced the relay even though both fans turn on fine. I also swapped the plugs to see if I would get a fan 1 code and still got 0481. Any ideas?


DTC P0481Cooling Fan Relay 2 Control Circuit .
You swaped what plugs ? Fan's ? That wouldn't change anything ! You need to know how these duel fan set up's work . With this code the fans will still work in low speed , not high !
Output driver modules (ODMs) are used by the PCM to turn on many of the current-driven devices that are needed to control various engine and transaxle functions. Each ODM is capable of controlling up to 7 separate outputs by applying ground to the device which the PCM is commanding ON. Unlike the quad driver modules (QDMs) used in prior model years, ODMs have the capability of diagnosing each output circuit individually. If an improper voltage level has been detected on ODM B output 2, which controls the high speed, relay 2, and series/parallel cooling fan relays, DTC P0481 will set.
Do you know how to do automotive electrical testing ?
Diagnostic Aids
Check for the following conditions:
• Poor connection at PCM -- Inspect harness connectors for the following items:
- Backed out terminals
- Improper mating
- Broken locks
- Improperly formed or damaged terminals
- Poor terminal to wire connections
• Damaged harness -- Inspect the wiring harness for damage.
• If the harness appears to be OK, disconnect the PCM, turn ON the ignition and observe a digital multimeter connected between the Fan Relay 2 driver circuit and ground at the PCM harness connector while moving connectors and wiring harnesses related to the series/parallel fan relay and the high speed fan relay. A change in voltage will indicate the location of the fault.
If the DTC cannot be duplicated and is determined to be intermittent, reviewing the Failure Records can be useful in determining when the DTC was last set. Also refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.


Relay Driven Dual Cooling Fan Diagnostics

Apr 24, 2017 | Cars & Trucks

1 Answer

What is an electronic relay?


A device used to transmit power to a motor or component, without sending that high power through the switch itself, which would burn out the switch in a short time. The switch is used to energize the relay so the power can be transmitted through the relay to the component.
A relay has two sides to it-the power side and the coil side. When the coil side is energized, say by the switch turning on, it causes the power side of the relay to connect the high power source to the wire going to the component or motor. Automakers use several relays throughout the car and its electrical circuits.

Dec 06, 2012 | 2008 Volkswagen Passat Sedan

1 Answer

My Honda accord 97 when turn key only goes click


You should have a Starter Relay which connects the power from the battery to the starter. Unless your battery is low, the starter is frozen, or an Antitheft device is active, the Relay must be bad.
Taking car to have the car in neutral if a manual trans or Park if an automatic trans, you can jump the power across the bad relay with a single battery cable jumper and crank the engine. If the engine turns over, you know the relay is bad.

Apr 19, 2012 | 1997 Honda Accord

1 Answer

Auto shut down from hitting a bump- no fuel pump or ignition - voltage gauge not working


You have a ASD relay (Auto shut down relay) this is not a safety device you basically knock something loose.Turn the key on do you hear the fuel pump go on. If you dont check the fuses for a open condition and fusable link that are on the battery with key on wiggle battery negative terminal especially at the engine block and the frame ,same with the Positive part of the battery terminal .

Mar 07, 2012 | 1994 Jeep Grand Cherokee

1 Answer

What is the relay on the fuse box


A relay is a switch that opens and closes the circuit going to the device it's connected to. In other words, the relay controls whether the device it's connected to is getting power, and the relay in turn is controlled by the computer.

Mar 10, 2011 | Volkswagen Golf Cars & Trucks

1 Answer

The driver seat dosent go forward or back


make sure there obstructions under the seat, check for a relay to the seats, replace the relay. If the relay isn't bad, replace the motor itself. Check all elctrical connections and devices before spending any money.

Oct 20, 2010 | 1994 Jaguar XJ6

1 Answer

SV10 - V6 - Camry no power is getting to my fuel pump the fuse is ok and fuel pump works i can not find a fuel cut or fuel relay. A postion exists however its not in use. All I did was jack it up rotate...


SWITCHES & RELAYS Switches are used in electrical circuits to control the passage of current. The most common use is to open and close circuits between the battery and the various electric devices in the system. Switches are rated according to the amount of amperage they can handle. If a sufficient amperage rated switch is not used in a circuit, the switch could overload and cause damage. Fig. 1: The underhood fuse and relay panel usually contains fuses, relays, flashers and fusible links tcca6p02.jpg
Some electrical components which require a large amount of current to operate use a special switch called a relay. Since these circuits carry a large amount of current, the thickness of the wire in the circuit is also greater. If this large wire were connected from the load to the control switch, the switch would have to carry the high amperage load and the fairing or dash would be twice as large to accommodate the increased size of the wiring harness. To prevent these problems, a relay is used. Relays are composed of a coil and a set of contacts. When the coil has a current passed though it, a magnetic field is formed and this field causes the contacts to move together, completing the circuit. Most relays are normally open, preventing current from passing through the circuit, but they can take any electrical form depending on the job they are intended to do. Relays can be considered "remote control switches." They allow a smaller current to operate devices that require higher amperages. When a small current operates the coil, a larger current is allowed to pass by the contacts. Some common circuits which may use relays are the horn, headlights, starter, electric fuel pump and other high draw circuits. Fig. 2: Relays are composed of a coil and a switch. These two components are linked together so that when one operates, the other operates at the same time. The large wires in the circuit are connected from the battery to one side of the relay switch (B+) and from the opposite side of the relay switch to the load (component). Smaller wires are connected from the relay coil to the control switch for the circuit and from the opposite side of the relay coil to ground tcca6g02.gif
prev.gif next.gif --- I am not aware of an inertia switch on Toyota vehicles. I don't think it's like a ford. Look for a fusible link, fuse, or relay problem.

Jul 26, 2010 | 1996 Toyota Camry

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