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Relay

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Question
Fuel problem
I would recommend checking your relays to ensure that they are working properly. A faulty relay is more common than a fuel pump going bad. If your relays are fine, you may need to get a new fuel pump. ...
Question
Radiator fan is not turning on
Once the relay and fuse have been checked and are working, the next thing to check is the controller for the fans that determines which fans operate and at what speed. There are several inputs to this controller: coolant temperature,...
Question
Where is the heater fan blower motor relay located? 2003 Chevy Silverado 1500
Hello - the blower fan relay is located behind the glove box - small black plastic square. Make sure both fuses for the HVAC/heater are good, and have power to them (one is 10 amp, one is 30 amp). If...
Question
Overheating
This may be related to a failing coolant fan switch. As you may know the coolant fan switch helps to maintain the proper coolant temperature by turning on and off at specific temperature thresholds. When this switch is not working...
Question
My car is marking the abs
Hi there: I'm not quite sure as to what you're asking here, however, if the ABS system on your 2005 Saturn is not working properly, or the check engine or ABS warning lights have been triggered on the dashboard, you...
Question
Why does the reduced power light flash when I try to start my vehicle in the morning after sitting overnight?
It sounds like your engine needs a "tune up". This typically means new oil, oil filter, spark plugs, spark plug wires, fuel filter, fuel pump if needed, new battery, new air filter, and a few other components if need be....
Question
No power to the fuel pump and the fuel relay is not getting power.
Hello. If you there is no power to the fuel pump or the relay, then there may be a possible electrical issue with the vehicle. I would first verify that the main EFI, fuel pump, and ignition fuses are not...
Question
Over heating
This can be caused by a number of things such as low coolant levels, a faulty thermostat, or a failing coolant fan switch. As you may know the coolant fan switch helps to maintain the proper coolant temperature by turning...
Question
Replaced fuel pressure regulator and fuel pump,still no power going to fuel pump
This sounds like you may not have any power going to the fuel pump relay. The relay wires should have ground on two wires, power on one wire and switched power on another wire. To activate the fuel pump your...
Question
Car won't blow any hot or cold air
This may be related to a faulty blower motor or blower motor relay. The blower motor is a unit inside your vent system that blows warm air from the heater core to the vents when the heater is on or...
Question
The heater wont turn on, on any setting.
This may be related to a faulty blower motor or blower motor relay. Occasionally, the blower motor itself will wear out or become faulty working intermittently as the bruch contacts inside the motor wear out. The blower motor relay supplies...
Question
Engine cranks but wont run. Power not reaching fuel pump
This sounds like you may not have any power going to the fuel pump relay. The relay wires should have ground on two wires, power on one wire and switched power on another wire. To activate the fuel pump your...
Question
My car heater isnt working.
This may be related to a faulty blower motor or blower motor relay. The blower motor is a unit inside your vent system that blows warm air from the heater core to the vents when the heater is on or...
Question
Heater not working
This may be related to a faulty blower motor or blower motor relay. The blower motor is a unit inside your vent system that blows warm air from the heater core to the vents when the heater is on or...
Question
My truck wont blow either heat or cold air?
Assuming you are referring to the blower motor resistor being replaced, this is the unit that controls the speed of the blower motor (i.e. low, medium and high speeds). The blower motor relay is a separate unit that directs power...
Question
What can cause a.c in my car not blow out?
This may be related to a faulty blower motor or blower motor relay. The blower motor is a unit inside your vent system that blows warm air from the heater core to the vents when the heater is on or...
Question
Fuel pump relay location.
Relays are always a good location to test a system. You are on the right track in that respect. Unfortunately, your car does not have a traditional fuel pump relay. It has what is known as the Fuel pump driver...
Question
Car is not getting fuel. I changed fuel pump and checked the fuel pump relay. It was in good condition. What else could it be?
This may likely be related to the fuel pressure regulator. This is a unit that helps to maintain the fuel pressure in the system. When this is not working, this may cause an erratic fluctuation in the fuel pressure or...
Question
Why does my Tahoe start with the fuel pump relay pulled out or left in?
Hi there. Check to see what relay you have pulled. If indeed you removed the fuel pump relay and the engine still starts up, then check the oil pressure switch. An oil pressure switch will kept the engine running as...
Question
Radiator fans wont turn off unless I turn off the car, why?
It sounds like you have checked just about everything that controls the fans other than the fan power relay itself. As you may know the coolant fan relay turns the fans off and on by receiving information from the coolant...

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