When working around any part of the fuel system, take precautionary steps to prevent fire and/or explosion:
Disconnect the negative terminal from battery (except when testing with battery voltage is required).
Whenever possible, use a flashlight instead of a drop light.
Keep all open flame and smoking material out of the area.
Post a `no Smoking' sign if smokers may be present.
Use a shop cloth or similar to catch fuel when opening a fuel system.
Relieve fuel system pressure before servicing.
Use eye protection.
Always keep a dry chemical (class B) fire extinguisher near the area.