How to resolder a faulty Mercedes OVP relay?
How to resolder a faulty Mercedes OVP relay (overvoltage protection relay) this relay can cause problems with idle speed,ABS brakes etc. ..jump starting another car or improperly hooking up booster cables can also cause the relay to become fried,as can moisture/corrosion. follow me on twitter https://twitter.com/fupabox Loading…
What does the fuel enrichment circuit do on a Mercedes Benz?
This includes the idle and cold fuel enrichment circuits. The fuel enrichment circuit is used to start you engine when it is cold. The idle circuit is used for increased rpm when the engine is cold, and curb idle when the engine is warmed up.
What is the voltage of the overload protection relay?
Tech Tip: When checking voltage at the pins of the overload protection relay pin 30 is hot with the key on and pins 87 are the output voltage to the control units. If the relay is blown there will not be voltage present at pins 87. “
How to change fuel pump Realy and OVP relay?
Tutorial on how to change a Fuel Pump Realy and an OVP relay. Symptoms of bad either are hard to start, low RPMs (300-600), seemingly weak response, won’t start at all, fuel pump not whirring when key is on ‘3’ position, and problems with uneven throttle.
Where is the OVP relay located on a Mercedes Benz?
On W126 chassis it is located between the 2 firewalls underneath the hood. On W107 chassis it’s located behind the right kick panel. Check the 10 amp fuse on top of it first. If it is blown, replace it. If it is good, check the socket that that the fuse sits in for corrosion. Clean and/or replace as necessary.
What does the Mercedes over voltage protection relay do?
The Mercedes over voltage protection relay provides voltage to the ABS and Mercedes engine control units. In the case of hard start, when you cut off the voltage supply to the engine control unit, you loose all of your cold idle circuits.
Where is the OVP on a Mercedes Benz W124?
The OVP is located behind the battery which is located under the hood at the rear of the engine compartment on the right side (red arrow). Use a 13mm wrench and disconnect the cables from the battery posts. Remove the negative or ground cable (red arrow) first and then remove the positive (yellow arrow) cable.