2004 170 MONTAUK Combined Sidelights Lamp Not Illuminating

[joemahoney79]

Q1: what miniature electric light bulb is used in the combined sidelight lamp of a 2004 170 MONTAUK?

ASIDE: the Boston Whaler part number for the lamp assembly is thought to be 1035203. My kids report [the combined sidelights lamp is not illuminating on our 2004 170 MONTAUK. ] I won't be able to access the boat to service the lightbulb prior to our trip.

[jimh]

There could be many reasons that the combined sidelights lamp on you 2004 170 MONTAUK is not illuminating, other than a incandescent miniature lightbulb filament has burned out. Other causes could be a poor connection:

• in the lightbulb holder socket;
• in the electrical wiring
• in a connector that carries the power to the lamps, or
• due to a blown fuse in the circuit that powers the lamp.

Replacement Lightbulb Source

There is a good chance the lightbulb is a Festoon style 12-Volt incandescent type. Festoon-style miniature lightbulbs are often used in boat navigation lamps. The Festoon light bulb in the OEM lamp MIGHT be similar to one available from WEST Marine:

https://www.westmarine.com/ancor-festoon-base-12.0v-15w-0.97a-12cp-297335.html

Poor Contact in Lamp

In an archived discussion, there is a report that failure of the lamp to illuminated was due to a mechanical problem with the lamp fixture. See

2014 170 Montauk Navigation Lamp
https://continuouswave.com/forum/viewtopic.php?t=7153

for more details.

Another archived discussion with useful information on this topic is located at

Replacement Lens for Combined Sidelight Bi-color Lamp
https://continuouswave.com/forum/viewto ... =9&t=10158

This second reference shows nice details of the interior of the lamp assembly.

[jimh]

Electrical Circuit Problem or Fuse
If the cause of the problem of no illumination of the lamp is something related to the electrical circuit, there is a detailed explanation of the circuitry used to control the lamp and the fuse that protects the circuit in a prior discussion at

Navigation Lamp Circuits Used on Newer Boston Whaler Boats
https://continuouswave.com/forum/viewto ... f=9&t=4136