what make sthe underhood electric cooling fan work (or not)on my 87 landcruiser wagon?
electricity?
just kidding…there’s a heat sensitive switch (normally) screwed into the radiator. It will have 2 wires (sometimes on a single connector). If you unplug that from the radiator, and short those wires, the fan should run. Ignition may or may not have to be on. Probably not, but sometimes they do require it.
The fan itself might actually be bad. Only way to test that is to apply power directly to the fan.
Check the fan fuse first. There’s also probably a relay somewhere.