Can anybody teach me how to test my 4-wheel drive relay. When I push my 4WD button on the dash(fj-62) I do not get the engagement of the transfer case. I tried switching the hoses on the solenoids to see if one was bad but there was no change. I thought it might be the cold weather but it did warm up to above freezing and no change. The light did not come on in the dash so the t-case is not engageing, and the hubs do lock in. Any help greatly appreciated.