Another guy on the web with an eletronics degree or two suggested the following on this type of electrical problem. I thought I would share it with you since it is such valuable info.
The dielectric grease is a band-aid. It should not be needed on a properly working system. The bulb is probably not direct grounded to the bodywork at the bulb location, as the bulb is typically twisted into a plastic housing. One of the two wires from the bulb connector will run to a ground ring terminal somewhere probably on the frame in the general location of the lamp.
--------------------The product you should be using is a unique type of contact enhancer and lubricant called Stabilant 22.
This chemical, which is applied to electrical contacts, greatly enhances the connection and lubricates the contact point; it is much more effective than conventional contact cleaners or lubricants.
Stabilant 22 is a liquid-polymer semiconductor; it behaves like liquid metal and conducts electricity in the presence of an electric current. In the presence of a large voltage gradient, the polymer becomes conductive. The substance also fills the air gaps between the mating surfaces of two items that are in contact, making the surface area of the contact larger and also keeping out oxygen and other contaminants that can oxidize and corrode the contact point.
This chemical is available in several forms. Stabilant 22 itself is the concentrated version, whereas Stabilant 22a is a version diluted with isopropanol in a 4:1 ratio. An even more diluted 8:1-ratio version is sold in many high-end stereo and audio shops under the name Tweek. Just 15ml of Stabilant 22a sells for about $40, whereas a liter of the concentrate costs about $4,000!
Stabilant 22 is fairly expensive, but very little is required in an application, and nothing else has been found to be as effective in preserving electrical contacts. (NASA uses the chemical on spacecraft electronics.) An application of Stabilant can provide protection for up to 16 years, according to its manufacturer, D.W. Electro-chemicals.
Pretty good info. eh? I guess my SSR is good for the next 16years electrically! Hope so any way. Fascinating what the mechanics of our new vehicles involve on a technological level.