# 2015 MS 1200S DVT - Fuel pump relay not operating on switch on, Test please

**URL:** https://forum.docgb.org/t/2015-ms-1200s-dvt-fuel-pump-relay-not-operating-on-switch-on-test-please/7334
**Category:** Technical Help
**Created:** [December 17, 2025, 3:10pm UTC](https://forum.docgb.org/t/2015-ms-1200s-dvt-fuel-pump-relay-not-operating-on-switch-on-test-please/7334 "2025-12-17T15:10:33Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Lochnagar](https://forum.docgb.org/user_avatar/forum.docgb.org/lochnagar/32/1505_2.png) [@Lochnagar](https://forum.docgb.org/u/Lochnagar)
#### Post date: [December 17, 2025, 3:10pm UTC](https://forum.docgb.org/t/2015-ms-1200s-dvt-fuel-pump-relay-not-operating-on-switch-on-test-please/7334/1 "2025-12-17T15:10:33Z")

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Dear All,

Yet to find the fault causing no fuel pump operation on initial switch on, (see similar thread dated 18th. February, 2025), so assistance required for a test.

If you have a similar bike please remove the keyless fob from the vicinity then press the immobiliser button under the cover by the fuel tank as if to enable a pin code start. With the button pressed the dash should activate and call for the 4 digit code input.

Questions :-

1. Does the fuel pump prime as soon as the dash activates but before the code is entered ?

2. If the answer to 1 is NO does the pump prime when the correct code is input and recognised ?

3. If the answer to 1 is YES but the wrong code entered what is the result when you press the RH handlebar starter button ?

If all functions correctly and a valid code entered the engine should start on the button, how I wish this were the case with this Churchillian “riddle wrapped in a mystery inside an enigma” gracing my work bench !!!

Thanking you all in anticipation of your actions.

 ![DSC_1039](https://forum.docgb.org/uploads/default/original/2X/2/2615f9a675327974f2cada6c790b90f860d4350f.jpeg)