Chrysler Repair: Cooling Fan Doesnt Turn On, volt ohm meter, neon glow

Question
QUESTION: The cooling fan, on my radiator, doesn't turn on at all, causing the coolant in my radiator to overheat in stop n' go traffic. I'm assuming that it doesn't do that while I drive because the air flowing in from the front keeps it cool enough. I've asked around and gotten a few different answers, ranging from "It may be the relay" to "It may be the thermostat not coming on to tell the fan to turn on." I'm now quite confused and not sure which option to go with.

ANSWER: Hi Jonathan,
It takes the following to make the fan run:
a fuse to supply the power,
a relay to switch on the power,
a temperature sensor (which also controls the mixture so if you have no issues with the engine that is probably not the cause) to tell the relay to switch on,
and a working fan motor
Tell me the model and year and I will tell you where to find these parts and how to test for which is bad. Do you have a volt-ohm meter or a 12V neon glow light to work with?
Roland

---------- FOLLOW-UP ----------

QUESTION: It's a '96 Grand Voyager. No i don't have either of those tools at the moment...

Answer
Hi Jonathan,
Unufortunately I have to ask another question, or at least answer the question in two ways. I have the '95 and '98 manuals, which are different as regards the fan relay. So I have to say that if your power distribution center box, under the hood  shows there to be three fan relays (hi, lo, and ground) then we have several possible things to check.
If on the other hand there is no fan relay of any kind mentioned in that box (the box will be long and purely rectangular) then I would check fuse 24 in that box, and if that is ok I would suggest that the fan relay (which is located on and bolted to the frame rail on the left side of the van, just at the lower left corner of the fan assembly) is probably blown. That external relay was problemmatic in the later '90's and in fact was recalled for that reason. So check and tell me if you have the power center that is rectangular and has a bulge at one end (the '95 type) and we can go further with that approach. You know what to do if you have the '98 style box.
Roland