Tgalo 118 #1 Posted May 21, 2022 Hi all, hoping someone can help. Been chasing this problem for a while now. When I first start my 520 all dash light are normal. After a few minutes all the lights come on and the oil light flashes. I replaced the ignition switch but problem still there. Any other ideas? Thanks, Tony Share this post Link to post Share on other sites
nylyon-(Admin) 7,866 #2 Posted May 21, 2022 Maybe check the test switch when it happens, open would be ok, closed and the switch is suspect Share this post Link to post Share on other sites
Tgalo 118 #3 Posted May 21, 2022 I dont think it has a test switch, my 418 and 312 do but I dont see anything on the 520. Share this post Link to post Share on other sites
Handy Don 13,682 #4 Posted May 22, 2022 3 hours ago, Tgalo said: I dont think it has a test switch, my 418 and 312 do but I dont see anything on the 520. Hmmm. On the late 80's 520's the light switch and test switch were symmetrically placed on opposite sides of the the indicator lamp panel. Was yours modified? Share this post Link to post Share on other sites
Tgalo 118 #5 Posted May 22, 2022 (edited) I don't believe so. It's a 94 so maybe thats why? I think Im going to replace the plug to the ignition switch. Looks pretty bad. Edited May 22, 2022 by Tgalo Share this post Link to post Share on other sites
nylyon-(Admin) 7,866 #6 Posted May 22, 2022 Reading the OM, the lights go through a self test when the key is turned on. Makes me wonder if there’s a bad connection, or a malfunctioning circuit board running the self test. 2 Share this post Link to post Share on other sites
lynnmor 7,706 #7 Posted May 22, 2022 9 minutes ago, Tgalo said: I don't believe so. It's a 94 so maybe thats why? I believe that the test switch disappeared after 1990. Share this post Link to post Share on other sites
cleat 7,167 #8 Posted May 22, 2022 I noticed that some of my 520's when I first got them had a lot of crud on the indicator light board. You could try pulling it out and cleaning it. It is held in by 2 phillips head screws from behind. 1 Share this post Link to post Share on other sites
Tgalo 118 #9 Posted May 22, 2022 7 minutes ago, nylyon said: Reading the OM, the lights go through a self test when the key is turned on. Makes me wonder if there’s a bad connection, or a malfunctioning circuit board running the self test. Yeah I just edited my last post. The plug to the ignition switch looks nasty. Is that a standard plug? Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,389 #10 Posted May 22, 2022 Click on the picture in the link Share this post Link to post Share on other sites
